Although there has been and still may be a difference of opinion as to the value and permanency of Lamarck’s theoretical views, there has never been any lack of appreciation of his labors as a systematic zoölogist. He was undoubtedly the greatest zoölogist of his time. Lamarck is the one dominant personage who in the domain of zoölogy filled the interval between Linné and Cuvier, and in acuteness and sound judgment he at times surpassed Cuvier. His was the master mind of the period of systematic zoölogy, which began with Linné—the period which, in the history of zoölogy, preceded that of comparative anatomy and morphology.