The Biology of the Crocodilia 3 
. Max. 
Habitat Size 
E. Snout short and broad; conformation 
barely suggesting a triangular outline 
Crocodilus palustris, Swamp Crocodile India and 
; Malasia 12 ft. 
Osteolemus tetrapis, Broad-nosed Crocodile W. Africa 6 ft. 
D’. Outline of head similar to that of Section 
D 
Caiman trigonotus, Rough-backed Caiman |Upper Amazon] 6 ft. 
Caiman sclerops, Spectacled Caiman Central and 
S. America 7-8 ft. 
Caiman palpebrosus, Banded Caiman Tropical South 
America 7-8 it. 
F. Snout very broad; bluntly rounded at 
tip 
Caiman latirostris,t Round-nosed Caiman Tropical South 
America 7-8 ft. 
Caiman niger,? Black Caiman Tropical South 
America 20 ft.? 
Alligator mississippiensis, American Alligator] Southeastern 
United States 16 ft. 
Alligator sinensis, Chinese Alligator China 6 it. 
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 Gavialide and Crocodilide, 
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 
t 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, 
