100 



CHELONTA. 



exception in some cases of the first), and much narrower than the 

 costals; nuchal long and narrow. Plastron moderately large ; the 

 width of the bridge considerably exceeding that of the posterior 

 lobe, which is broadly notched ; in some cases a ligamentous union 

 between the hypoplastrals and carapace. Digits without distinct 

 web. 



Length of carapace 0,130 to 0,150. 



Hah. India (Bengal and Assam). 



Var. sivalensis. 



Larger than the type, attaining a length of 0,178 ; the first 

 and second vertebral shields relatively wider, and all the vertebrals 

 tending to assume a more decided balloon-shape. 



Fig. 21. 



Nicoria tricarinata, var. sivalensis. — The carapace ; from the 

 Pliocene of the Siwalik Hills. ^. 



39839. The imperfect shell; from the Pliocene of the Siwalik Hills. 



(Fig.) The type of the variety ; described and figured by the 



writer in the ' Taloeontologia Indica ' (Mem. Geol. Surv. 



