20 NOMENCLATURE 
marques 4 perfectionner les distributions ; faire 
sortir enfin de cette fécondation mutuelle des 
deux sciences, l’une par l’autre, un systéme 
zoologique propre & servir d’introducteur et de 
guide dans le champ de l’anatomie, et un corps 
de doctrine anatomique propre 4 servir de dé- 
veloppement et d’explication au systéme zoolo- 
gique.” * 
Tt is deeply to be lamented that so many nat- 
uralists have entirely overlooked this significant 
advice of Cuvier’s, with respect to combining 
zoological and. anatomical studies in order to 
arrive at a clearer perception of the true affini- 
ties among animals. To sum it up in one word, 
he tells us that the secret of his method is 
“comparison,” — ever comparing and compar- 
ing throughout the enormous range of his 
knowledge of the organization of animals, and 
founding upon the differences as well as the 
similarities those broad generalizations under 
* “T therefore felt myself obliged, and this obligation cost me 
no little’time, to make my studies in anatomy and zodlogy, dissec- 
tion and classification, keep pace with each other; to seek in my 
earlier investigations upon organization a better distribution of 
groups; to employ these again as a means of perfecting my 
classification ; to arrive, in short, by this mutual fecundation of 
the two sciences at a zodlogical system which might serve as a 
pioneer and guide in the field of anatomy, and an anatomical 
method which would aid in the development and explanation of 
the zodlogical system.” 
