ELEMENTS 



OF 



COMPARATIVE ANATOMY. 



VERTEBRATE ANIMALS. 

 CLASS I. MAMMALIA.* 



TEGUMENTARY SYSTEM. 



THE Integument of the Mammalia resembles in many respects that 

 of Man, the chief differences between them occurring in the epi- 

 dermis and its horny appendages. The fatty tissue beneath the 

 skin is often developed to a surprising degree, and the corium is 

 very thick, as appears in all large animals, such as the Elephant, 

 Rhinoceros, and other Pachydermata. Various kinds of pigment 



* Frequent reference being made throughout the text to the several Orders of 

 Mammalia, a tabular view of the arrangement of that Class is subjoined. 



Class MAMMALIA. 



Order I. QUADRUMANA. Ex. Chimpanzee, Lemur. 

 II. CHEIROPTERA. Ex. Bat. 



(" Insectivora. Ex. Hedgehog, Mole, Shrew. 

 III. CARNivoRA.-?Ferae. Ex. Sear, Weasel. Cat. 

 (. Pinnipedia. Ex. Seal, Morse. 



IV MARSUPIAT* $ Mt Carniv ra. Ex. Opossum. 

 IV. MARSUPIATA. ^ M Fruglvora ._ Ex> Kangaroo. 



(E. 



VI. EDENTATA. < E. Ordinaria. Ex. Armadillo, Ant-eater, Pangolin. 

 (E. 



V. RODENTIA. Ex. Squirrel, Rat, Beaver. 



'E. Tardigrada. Ex. Sloth. 



Ordinaria. Ex. ArmadiLv. -n,..w c , , * u,,. 6 <y t ., 

 Monotremata. Ex. Ornithorynchus, Echidna. 



VII. PACHYDERMATA. Ex. Elephant, Rhinoceros, Hog. 

 VIII. SOLIDUNGULA. Ex. Horse. 

 IX. RUMINANTIA. Ex. Camel, Giraffe, Ox, Sheep. 



X TFT APT- A 5 C - Herbivora. Ex, Dugong. 



* 1 C. Ordinaria. Ex. Whale, Porpoise. 



I 



