The Biology of the Crocodilia 



Habitat 



Max. 



E. Snout short and broad; conformation 



barely suggesting a triangular outline 

 Crocodilus palustris, Swamp Crocodile 



Osleolcemus tctrapis, Broad-nosed Crocodile 



D'. Outline of head similar to that of Section 



D 



Caiman trigonolus, Rough-backed Caiman 

 Caiman sclerops, Spectacled Caiman 



Caiman palpebrosus, Banded Caiman 



F. Snout very broad; bluntly rounded at 



tip 

 Caiman latirostris, ' Round-nosed Caiman 



Caiman niger, 2 Black Caiman 



Alligator mississippiensis, American Alligator 



Alligator sinensis, Chinese Alligator 



India and 



Malasia 

 W. Africa 



Upper Amazon 

 Central and 

 S. America 



Tropical South 

 America 



Tropical South 



America 

 Tropical South 



America 



Southeastern 



United States 



China 



12 ft. 



6 ft. 



6ft. 

 7-8 ft. 

 7-8 ft. 



7-8 ft. 



20 ft. 3 



1 6 ft. 

 6ft. 



Gadow in the Cambridge Natural History (p. 450) 

 agrees with Boulanger in believing that the recent 

 Crocodilia cannot be separated into different 

 families, yet he describes seven families of Croco- 

 dilia, two of which, the Gavialidce and Crocodilidcc, 

 include the living members of the order ; the former 

 includes the gavials, of course, and the latter the 

 crocodiles, alligators, and caimans. 



Though "doctors disagree" thus in regard to 

 the scientific classification of this small group of 



1 These species are exceptions in their genus. The snout is blunt 

 like that of the genus Alligator. 



* Alleged to grow to this size by competent observers. 



