NOTES AND ILLUSTRATIONS. 99 



He subdivides vertebral animals into two branches ; those with warm blood and those 

 wit!; cold blood. 



Each of these two branches is divided into two classes. Those of the animals with 

 warm blood are, 



1. Mammalia. 



2. Birds. 



The classes of vertebral animals with cold blood are, 



1. Reptiles. 



2. Fishes. 



The invertebral animals ought to be divided into five classes : 



1. Mollusca. 



2. Crustacea. 



3. Insects. 



4. Terrestrial worms and leeches. 



5. Zoophyta. 



He then divides the class mammalia into the following orders : 



1. Cetacea. 



2. Ruminantia ; all cloven-footed. 



3. Pachydermata ; more than two toes to the foot ; incisive teeth in both jaws, 



and frequently enormous canine teeth. 



4. Solipeda ; having only one apparent toe to each foot. 



5. Tardigrada -, toes united by the skin and cannot be moved separately ; no 



dentes incisores. 



6. Edentata ; resembling the former in the little freedom of the toes, and the want 



of the incisores ; have a simple stomach. 



7. Rodentia ; claws ; long incisive teeth at the end of each jaw, without any 



canine teeth. 

 3. Sarcophaga; like the former in the claws, but a more complete set of teeth; 

 incisores short and strong; canine teeth and molares. 



9. Amphibia. 



10. Bats. 



11. Quadrumana, which of all the manimiferous animals are those that most 

 resemble man. 



For the remaining outlines of this system see 6?. Clavier's Lectures on Comparative 

 Anatomy, translated by William Ross, vol. 1. art. 5. 



