68 



REPTILES OF THE WORLD 



of quite a high mound; the eggs are laid near the bot- 

 tom of this mound; the heaped up sticks and decom- 

 posing vegetation covering them soon generates a con- 

 siderable temperature, hastening their incubation. 



Before entering upon details of structure distinguish- 

 ing the various species, besides the habits, the student 

 should be presented with a concise tabulation, showing 

 the general standing of the crocodilians. Existing spe- 

 cies show such perfect intergradation it is impossible to 

 divide them into families. Hence they are all embraced 

 in the family Crocodilidce. A tabulated list follows: — 



