TKIONTCHIDJE. 15 



the unsculptured bands are very distinct. The anterior 

 angles of the first neural are not truncated. No history. 



25230. Portions of a carapace, comprising the first and second 

 neurals, the first three costals of the right side, and the 

 last three on the left ; from Hordwell. The sculpture is 

 of the general appearance of that of the type of T. mar- 

 ginatus. Presented by Searles V. Wood, Esq., 1850. 



25230 a. The left half of a nuchal ; from Hordwell. This speci- 

 men closely resembles No. 32348. 



Presented by Searles V. Wood, Esq., 1850. 



R. 1434. Fragment from the middle region of a carapace, perhaps 

 belonging to this form ; from Hordwell. This specimen 

 shows two entire neurals, the corresponding costals of the 

 left side, and the proximal portions of the opposite costals. 

 The unsculptured bands on the costals are of great width. 

 A vertebral centrum is shown. No history. 



Specifically undetermined specimens from Hordwell, some of which 

 probably belong to the species last mentioned. 



30410 C. A mandible. In the flattened oral surface of the dentary 

 this specimen resembles the mandible of T. niloticus, and 

 totally differs from that of T. gangeticus and other Asiatic 

 forms ; it has no oral ridge. Hastings Collection. 



R. 1499. The imperfect mandible of another species. In the form 

 of the symphysis this mandible comes nearest to T. hurum, 

 differing from that of T. phayrei in the absence of an 

 oral ridge. If the preceding specimen belong to T. henrici, 

 the present one may be referable to T. planus. 



Hastings Collection. 



30403 x. A large imperfect cervical vertebra. Hastings Collection. 



30403 x-1. Two imperfect cervical vertebrae of smaller size. 



Hastings Collection. 



R. 1488. Two imperfect cervical vertebras agreeing closely with the 

 preceding specimens. Hastings Collection. 



R. 1488 a. An imperfect eighth cervical vertebra. Hastings Collection. 



