Pare 17. 
Chelone breviceps. 
Fig. | 
1. Side view of the skull, nat. size. | 
a. Prefrontal. 
0. Maxillary. 
c. Premaxillary. 
f. Frontal. 
y. Postfrontal. 
i A. Parietal. 
| i. Malar. 
k. Squamosal. 
m. Mastoid. 
1. Dentary. 
3. Angular. 
4. Surangular. 
5. Articular. 
2. Upper view of one half of the skull. 
a. Prefrontal. | A. Parietal. 
J. Frontal. | m. Mastoid. 
4. Postfrontal. | 
ng 
3. Under view of the skull. 
| c. Palatals. o. Paroccipital. 
| d. Vomer. q. Exoccipital. 
e. Premaxillary. r. Basioccipital. 
i. Maxillary. ss. Pterygoids. 
4. Malar. 1. Dentary. 
l. Tympanic. 4. Surangular. 
m. Mastoid. 5. Articular. 
4. Under view of part of another skull of the same species, without the lower jaw. 
5. Back view of the skull. 
g. Postfrontal. | gg. Exoccipitals. 
A. Parietal. . 7. Basioccipital. 
/. Tympanic. t. Basisphenoid. 
m. Mastoid. | 3. Angular. 
0. Paroccipitals. | 5. Articular. 
p. Supraoccipital. | y 
6. Side view of the carapace and plastron, with the cranium, four fifths of the nat, 
size. 
| 
| 
| 
