192 CHELONIA. 



2266. Slab exhibiting the dorsal surface of the second left costal ; 

 from Cuckfield. The extreme width of the vertebral and 

 the narrowness of the costal shields is well displayed. 



Mantell Collection. 



2347. Fragment of rock showing the ventral surface of the outer 

 part of an immature costal ; from Cuckfield. 



Mantell Collection. 



36529. The proximal portion of a left costal, probably the third ; 

 from Cuckfield. The sulcus dividing two vertebral shields 

 is well shown. Mantell Collection. Purchased, 1853. 



36529 a. An imperfect left (?) costal, apparently associated with 

 the preceding ; from Cuckfield. This bone is probably 

 either the second or the fourth. Mantell Collection. 



3523. The imperfect proximal portion of the third right costal; 

 from Cuckfield. This specimen agrees very closely with 

 the corresponding costal of H. latiscutata, the great width 

 of the vertebral shield being clearly indicated. 



Mantell Collection. Purchased, 1838. 



26022. The third marginal of the right side ; from Cuckfield. The 

 cavity for the insertion of the axillary pedicle is well 

 shown. Mantell Collection. Purchased, 1853. 



3501. A. smaller specimen of the third right marginal; from Cuck- 

 field. Mantell Collection. Purchased, 1838. 



R. 1519. A similar specimen; from Cuckfield. Mantell Collection. 



3504. An imperfect third right marginal ; from Cuckfield. 



Mantell Collection, 



R. 1520. The third left marginal; from Cuckfield. This specimen 

 agrees in size with No. 26022. Mantell Collection. 



R. 250. The imperfect third left marginal ; probably from Cuckfield. 



Egerton Collection. Purchased, 1882. 



3503. A lateral marginal of an immature individual ; from Cuck- 

 field. The pit for the insertion of the extremity of the 

 rib is well shown. In its narrow form, as compared with 

 the anterior and posterior marginals, this specimen accords 

 with the lateral marginals of the immature skeletons of 

 Idiochelys. Mantell Collection. Purchased, 1838. 



