- Young Specimen of an African River Crab
- Woodpecker drilling a hole for a nest
The woodpeckers are carpenters; they not only bore holes in trees in search of food, but they also chisel out deep holes in which to deposit their eggs and rear their young. They generally build their nest in May, selecting an old apple tree in the orchard; the boring is first done by the male, who pecks out a circular hole; as the work progresses, he is occasionally relieved by the female. They both work with great diligence, and as the hole deepens they carry out the chips, sometimes taking them some distance to prevent discovery or suspicion. The nest usually requires a week to build, and when the female is quite satisfied she deposits her eggs, generally six in number and of a pure white color. - White-Eared Antelope (A. leucotes), Male, Central Africa
White-Eared Antelope - Waterbok (Antilope [Kobus] ellipsprymna, Ogilby)
- Walrus, showing the upper incisors in the form of tusks
- Walrus skull, showing the powerful canine teeth
- Two-year old Southdown sheep
- Two Species of Caprellidæ
- Thelemark cows of Norway
- The Zoëa Larva of a Species of Sergestes
- The Woolly Kangaroo
The Woolly Kangaroo - The Tasmanian 'Mountain Shrimp'
- The Surface of the Left Cerebral Hemisphere, Cerebellum,and Medulla Oblongata.
Sensory areas are enclosed by broken lines; certain centres in the association-zones are marked by dots. The sensory area of smell is on the inner aspect of the brain; so also is the area of vision which borders the calcarine and retrocalcarine fissures, and only rarely extends on to the external surface, as shown in the diagram. The sensory area of hearing is largely hidden within the fossa of Sylvius, the opening into which is indicated by the dark line above it. The kinæsthetic-sensory areas for the various muscles of the body occupy the territory between the dotted line in front and the bottom of the fissure of Rolando behind. They do not extend on to the posterior wall of this fissure. It is impossible at present to define the boundaries of any of the centres in the association-zones. - The Sea-slater (Ligia oceanica)
- The Retina in Vertical Section
A, after Exposure to Bright Light; B, After Resting in the Dark. The arrow shows the direction in which light traverses the retina. C, Retinal epithelium, with its pigmented fringe. 1, Layer of rods and cones, separated by the external limiting membrane from 2, the layer of the nuclei of the rods and cones. 3, The ganglion-cells of the retina, which are homologous with the cells of the afferent root of a spinal nerve. Their peripheral axons ramify beneath the sensory epithelium (rods and cones and their nucleus-bearing segments), their central axons in 4, the inner molecular layer. D, Collecting cells on the front of the retina; a a a, their axons which conduct impulses to the brain; b, an efferent fibre from the brain. - The Phyllosoma Larva of the Common Spiny Lobster
- The Norwegian Deep-water Prawn (Pandalus borealis), Female
- The Nauplius Larva of a Species of Barnacle of the Family Lepadidæ, showing greatly-developed Spines
- The Mehari, or racing Camel
- The Heart cut in the Plane of its Long Axis, and the Vessels which open into and out of it
Chordæ tendineæ attach the margins of the auriculo-ventricular valves to musculi papillares which project from the inner aspect of each ventricle. - The Growth and Migration of Granules of the Cerebellum
Half a dozen nuclei of as yet undeveloped granules are seen lying beneath the pia mater. From this level to the bottom of the drawing granules are shown in successive stages of growth. These developing granules, selected from various preparations of the cortex of the cerebellum, were drawn from nature. - The Gribble (Limnoria lignorum)
- The Formation of an Image by the Refracting Media of the Eye
x, The common centre of curvature (nodal point of the several media). Rays which pass through this point are not deflected. y, The principal focus of the system. All rays which are parallel to the optic axis converge to this point. The image of the point A is formed at a, the spot at which a ray parallel with the optic axis meets an unbent ray—the image of B at b. - The External, Middle, and Internal Ear of the Left Side
From right to left, the figure shows the concha and lobule of the ear in profile; the external meatus (abbreviated); the drum, divided vertically, its posterior half visible; the hammer-bone, with the tip of its long arm attached to the drum, an arrow indicating the point of attachment and line of action of the tensor tympani muscle; the anvil attached by a ligament to the bony wall of the middle ear; the stirrup, with its foot-plate almost filling the oval window; the labyrinth, with the three semicircular canals above, and the scala vestibuli below. The curled black line shows the situation of the scala media, or ductus cochleæ (which contains the organ of Corti). Pulsations of sound which move the membrana tympani are transmitted by the three bones to the oval window. They shake the perilymph, producing waves which travel along the scala vestibuli to the apex of the cochlea, whence they return by the scala tympani to the round window (if they do not take a shorter course through the ductus cochleæ). The Eustachian tube opens out of the lower part of the middle ear. - The Diaphragm and Organs in Contact with it
The Diaphragm and Organs in Contact with it—A, in Expiration; B, at the End of a Deep Inspiration. Transverse Vertical Sections in the Line of the Armpit. A, At the end of an ordinary expiration the lung does not extend below the upper border of the eighth rib. From this level to the middle or lower border of the tenth rib the two layers of the pleura covering respectively the inner wall of the chest and the upper surface of the diaphragm are in contact. B, When the lung is distended with air it occupies the whole of the pleural cavity. - The Common Shrimp (Crangon vulgaris)
- The Common Sand-hopper (Talitrus saltator), Male, from the Side
- The Common Lobster (Homarus gammarus,) Female, from the Side
- The Brine Shrimp (Artemia salina)
- The Body of a Motor Neurone
In its centre is a large clear spherical nucleus, with a nucleolus. The body-substance is prolonged into five dendrites and an axon. Neuro-fibrillæ are seen in dendrites and axon. They traverse the body of the cell in all directions, in little bundles which are separated by angular granules of stainable substance (tigroids). - The Berkshire
- The Anterior Half of the Larynx seen from Behind
The drawing shows the folds of mucous membrane, the vocal cords, which stretch from the tips of the arytenoid cartilages to the recess behind the median portion of the thyroid cartilage. To the outer side of each vocal cord is seen the thyro-arytenoid muscle (cut across), consisting of a broad outer portion, chiefly concerned in closing the glottis during the act of swallowing, and a smaller internal portion, which regulates the length and the thickness of the segment of the cord allowed to vibrate. - The 'Fairy Shrimp' (Chirocephalus diaphanus)
- Thaumastocheles zaleucus
- Stages in the Life-history of Hæmocera danæ, One of the Monstrillidæ
- Small Breed White pig, Shown at Bedford
- Skull of Bear (Ursus), showing the dentition
- Siamese War Elephant
- Sheep-washing in Australia
- Sheep-shearing operations in Australia
- Sense-Organs susceptible to Pressure
All are formed on essentially the same plan; a fibrous capsule invests a group of epithelial cells amongst which a nerve ramifies. The simplest form is known as a Grandry’s corpuscle-a nerve ending in one or two plates between two or three epithelial cells. These organs are found in great numbers in the bills of aquatic birds. If a duck is watched whilst it is gobbling mud at the margin of a pond, it will be seen to have a remarkable capacity for discriminating between the shells of small snails, which it can crush, and stones, which it needs to drop from its bill. Its bill is also provided with small Pacinian corpuscles. - Ruffs ( Machetes pugnax )
The Ruff ( Machetes or Pavoncella pugnax ) may be regarded as a long-legged Strandlooper, the only representative of his family. The beak is as long as the head (but shorter than the barrel), straight, at the tip slightly lowered and not broadened, soft all along its length, the foot is high and slender, the lower leg naked well above the hocks; of the three fronts, the middle one is connected to the outer by a tension fleece; the short, high back toe does not touch the ground; the wings are of medium length and pointed; the tail is short, composed of 12 feathers, slightly rounded at the tip. - Restoration of a Trilobite (Triarthrus becki), showing the Appendages
- Remorse from an elephant
An elephant, from some motive of revenge, killed his cornack, or conductor. The man’s wife, who beheld the dreadful scene, took her two children, and threw them at the feet of the enraged animal, saying, “Since you have slain my husband, take my life also, as well as that of my children.” The elephant instantly stopped, relented, and as if stung with remorse, took up the eldest boy with his trunk, placed him on its neck, adopted him for his cornack, and would never afterwards allow any other person to mount it. - Red Blood-Corpuscles presenting, some the Surfaces, others the Edges, of their Discs, together with Single Representatives of Four Types of Leucocyte.
A, the most common type, highly amœboid and phagocytic. Its protoplasm is finely granular, its nucleus multipartite. B, a leucocyte closely similar to the last, but larger, and containing an undivided nucleus. It is shown with a cluster of particles of soot in its body-substance. C, a young leucocyte, or “lymphocyte.” D, a coarsely granular leucocyte. Its granules stain brightly with acid dyes—e.g., eosin or acid fuchsin. - Rambouillet-Negretti Ram
- Pylocheles miersii, a Symmetrical Hermit Crab
- Præanaspides præcursor, One of the Fossil Syncarida, from the Coal-measures of Derbyshire
- Prize Short-horn, 'Pride of Windsor' , shown at Islington
- Polycheles phosphorus, One of the Eryonidea, Female, from the Indian Seas
- Podolian Cow, Galicia
- Phronima colletti, Male. From a Specimen taken in Deep Water near the Canary Islands
- Organ of Corti
The spiral lamina, on the left of the drawing, gives attachment to the membrane of Corti, which stretches to the opposite wall. Below the membrane is a bloodvessel which runs its whole length beneath the tunnel of Corti. The tunnel is formed by pillars—the inner on the left, the outer on the right—which meet above it. On the left of the inner pillar is a hair-cell; to the left of this a nerve-cell with two nuclei. To the right of the outer pillar is a space; to the right of this four hair-cells alternating with four supporting cells, which hold up the reticulated membrane through apertures in which the tufts of hairs project. Three nerve-fibres are seen in the spiral lamina; they cross the tunnel to ramify between the rows of outer hair-cells. The lamina tectoria rests upon the tufts of hairs. - Opossum
- One of the Abdominal Somites of the Lobster, with its Appendages, separated and viewed from in Front
- Newly-hatched Young of a Crayfish
- Nests of the Bottle bird
Nests of the Bottle bird - Nests of Social Weavers
The social weaver is found in the south of Africa. Hundreds of these birds, in one community, join to form a structure of interwoven grass containing various apartments, all covered by a sloping roof impenetrable to the heaviest rain, and increased year after year as the population of the little community may require. - Negretti Merino Ram
- Nebalia bipes