406 
GEOGRAPHICAL ZOOLOGY. 
[PART IV, 
Family 55. — CKOCODILIDAL (1 Genus, 12 Species.) 
General Distribution. 
Neotropical 
Sub-regions. 
—2.3.4 
j Kearctio 
Subregions, 
Palaarctic I 
Sub-regions. 
Ethiopian I 
Sub-regions. 
Oriental 1 
Sub-regions. 
Australian 
Sub-regions. 
— 
| 1 . 2 . 3 ,4 
I . 2 . 3 . 4 
I 
The true Crocodiles, which have the canines in notches, and 
the large front teeth in pits in the upper jaw, are widely 
distributed over the tropical regions of the globe, inhabiting all 
the rivers of Africa, the shores and estuaries of India, Siam, 
and eastward to North Australia. Other forms inhabit Cuba, 
Yucatan, and Guatemala, to Ecuador and the Orinooko. Four 
species are Asiatic, one exclusively Australian, three African, 
and four American. These have been placed in distinct 
groups, but Dr. Gunther considers them all to form one 
genus, Crocodilus. 
Family 56. — ALLIGATOKIDiE. (1 Genus, 10 Species.) 
General Distribution. 
Neotropical 
Sub-regions, 
Nearctic 
Sub-regions. 
PaLjE ARCTIC 
Sub-regions. 
Ethiopian 
Sub-regions, 
Oriental 
SUB-REOIONS. 
Australian 
Sub-regions, 
2.3 
1 3 — 
The Alligators, which are distinguished by having both the 
large front teeth and the canines fitting into pits of the 
upper jaw, are eonfined to the Neotropical, and the southern 
part of the Nearctic regions, from the lower Mississippi and 
Texas through all Tropical America, but they appear to be 
absent from the Antilles. They are all placed by Dr. Gunther 
in the single genus, Alligator. 
General Remarks on the Distribution of Crocodilia, 
These animals, being few in number, and wholly confined 
to the tropical and sub-tropical regions, are of comparatively 
