14. NICORIA. 



119 



tetragonal and octagonal. Plastron extensively united to the cara- 

 pace by suture, with short axillary and inguinal buttresses, just 

 reaching the first and filth costal plates respectively ; cntoi)la.stron 

 intersected by tho humero-pectoral suture. Skull with a Ijony 

 temporal arch ; alveolar surfaces without median ridge ; choango 

 between the eyes. Upper surface of head covered with undivided 

 skin. Digits with a short web, or without. Tail short, not longer 

 in the young than in tho adult. 



East Indies ; Central and South xVmerica. 



Fig. 34. 



Skull of J^icoria tnjnga. (From Gray, P. Z. S. 1869.) 



Synopsis of the Species. 



I. Carapace tricarinate. 



Anterior and posterior margin of carapace 



strongly serrated ; beak strongly hooked. 1. sj^en^Ztr?, p. 120. 

 Borders of carapace not serrated ; beak 



more or less distinctly notched 2. trijiiga, p. 121. 



II. Carapace unicarinate. 



Digits shortly but distinctly webbed ; second 

 vertebral shield not or but slightly 

 broader than long in the adult 3. punctulcma, p. 123. 



Digits very shortly webbed ; second ver- 

 tebral shield broader than long ; a row 

 of large scales on the inner front of the 

 lower half of the tibia 4. gabbii, p. 126. 



