- Xenopsylla cheopis, male
- Two common centipedes
- Tutored Bear.—XIV. Century
- Tutored Bear.—XIV. Century
- The yellow fever mosquito (Aëdes calopus)
- The White Yak of the Asiatic Mountains
- The two wise cart-horses
- The Three-banded Armadillo. An Animal in a Coat of Mail
- The Striped Zebra of Africa
- The Starling. One of the Talking Birds
- The Savage Florida Alligator
- The Polar bear and her cubs
- The Otter, One of Nature's Fishers
- The Mocking Bird. No other Bird has such Versatile Vocal Powers
- The Italian tarantula
- The Elephant in a Well
- The Elephant and the Rotten Bridge
- The Cormorant, the Fishing Bird of China
- The Common Hedgehog with his Battery of Spines
- The cattle tick (Boophilus annulatus). (a) Female; (b) male
- The cat which died of grief
- The Cat and the Pigeon
- The Cat and the Knocker
- The Cat and the Frog
- The Black Swan of Australia
- The Ash-Coloured Buzzard
- The Alpine Ibex. Note the Curiously Knobbed Horns
- The Albatross swooping over the ocean waves
- Sting of a honey bee
- Some early medical entomology
- Simulium venustum
- Sepsis violacea; puparium and adult
- Section through a venom gland of Latrodectus 13-guttatus showing the peritoneal, muscular and epithelial layers
- Sarcoptes scabiei. Diagrammatic representation of the course in the skin of man
- Sarcoptes scabiei, male
- Sarcoptes scabiei, female
- Salivary glands of Notonecta maculata
- Rocky Mountain Sheep
- Reduvius (Opsicœtus) personatus
- Rasahus biguttatus
- Rabbit
- Polo's Sheep
- Poison apparatus of a honey bee
- Piophila casei
- Pediculus showing the blind sac (b) containing the mouth parts (a) beneath the alimentary canal (p)
- Pediculoides ventricosus, female
- Owl
- Otiobius (Ornithodoros) megnini, male. (a) dorsal, (b) ventral aspect
- Otiobius (Ornithodoros) megnini, head of nymph
- Notœdres cati, male and female
- Muscina stabulan
- Mountain Lion
- Mosquito
- Mosquito
- Mandible of Scolopendra cingulata showing venom gland
- Lynx in a tree
- Lucilia cæsar
- Linguatula. (a) larva; (enlarged). (b) adult; (natural size)
- Life cycle of the malarial parasite
- Left spiracle of nymph of Argas persicus