GENERAL ZOOLOGY 



Fig. 18.22. Representative La- 

 certilia. .-1, the Komodo monitor 

 lizard, I'aranus komodoensis. B, 

 the African chameleon. Chameleon 

 chameleon. C, a small tropica! 

 fence lizard. {A and B, photo- 

 graphs courtesy New York Zoo- 

 logical Society; C, photograph 

 by John F. Storr.) 



The order Crocodilia, including alligators and crocodiles (Fig. 18.24), is 

 represented in North America by the alligator. These, again, are reptiles that 

 have taken to the water, although still breathing air and coming to land for 

 egg-laying. In body form Crocodilia represent a generalized type, but in 

 some features of their internal anatomy these reptiles are much more highly 

 specialized than any other reptiles. This is notably true of the brain. 

 Early representatives of Crocodilia were contemporaneous with dinosaurs and 

 descended from the same stem among the primitive Reptilia. 



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