PLATE ۰ 
1. Upper surface of the symphysial end of the right ramus of the lower jaw of 
Crocodilus biporcatus. 
2. The same part of Crocodilus Hastingsie. 
3. The same part of Alligator niger. 
4. The hinder part of the right ramus of the lower jaw of Crocodilus biporcatus. 
5. The same part of Crocodilus Hastingsie. 
6. The same part of Alligator ۰ 
Figures 1, 2, 4, 5, two-thirds, 3 and 6 one half the nat. size. 
