188 



riEST BOOK OF ZOOLOGY. 



ropsida, which includes the Keptiles, and Birds ; and lastly 

 Mammalia. 



lohthyopsida is derived from two Greek words, iohthus, 

 a fish, and ojpsis, appearance. Sauropsida comes from two 

 Greek words, sauros, a lizard, and opsis, appearance. 



OJ 



Teetebeates. 



