PLATE 1 
Chelone breviceps, four-fifths nat. size. 
Fig. 
1. Upper view of the carapace. 
2. Under view of the plastron. 
3. Side view of the cranium: 7, parietal; 8, mastoid; 11, frontal; 12, post-frontal; 
21, maxillary; 26, malar; 27, sguamosal; 28, tympanic. 
4. Transverse section of the carapace and plastron. 
s1 to s10. The first to the tenth neural plate inclusive. 
pli to pls. The first to the eighth costal plates. 
رم‎ to va. Impressions of the first to the fourth vertebral scutes. 
e, e. Impressions of the costal scutes. 
es, Episternum. As. Hyosternum. ps. Hyposternum. as. Xiphisternum. 
