CLASS III. ORDERS II & HI. T7 



ORDER 2. SAURIA. 



Having a covering of scales, and walking on 

 'two or four feet. Heart with two auricles. 



LACERTA, (lizard, crocodile, chamelion,) body 

 four-footed, elongated, tailed ;. without any secon- 

 dary integument. 



DRACO, (dragon,) body four-footed, tailed, and 

 furnished on each side with an expansile, radiate, 

 wing-like skin. 



ORDER 3. OPHIDIA. 



Having no feet. Heart with two auricles, 



ANGUIS, (slow- worm,) scales both on the abdo- 

 men, and beneath the tail. 



AMPHISBAENA, (itch- worm,) body cylindrical 

 equal ; annular divisions both on body and tail. 



BOA, (giant snake,) scuta, or undivided plates, 

 both oil the abdomen, and beneath the tail. 



COLUBER, (viper, asp, ring-snake, green-snake, 

 spotted-snake, striped-snake,) scuta, or undivided 

 lamella under the abdomen ; broad alternate 

 scales, or divided laminae, under the tail. 



ACROCHORDUS, (w T arted-snake,) body and tail 

 completely covered with warts. 



HYDKUS, (water-snake,) body slender in front, 

 gradually thickening, scaled : tail compressed. 



CROTALUS, (rattle-snake,) scuta on the abdo- 

 men ; scuta and squamae beneath the tail ; rattle 

 terminating the taiL 



LANGAYA, (moccasin-snake,) abdominal plates j 

 caudal rings ; terminal scales. 



CAECILIA, (eel-snake,) body cylindric, equal ^ 

 wrinkles on the sides both of the body and taiL 



*T 



