ADDENDA. 235 



c. From the Cambridge Greensand. 



35300 x. The centrum of a cervical vertebra. This specimen is 

 probably referable to the Chelonidce. Purchased, 1859. 



35300 z. The centrum of a much smaller cervical (?) vertebra. 

 In size this specimen would agree with some of the 

 skulls of Bhinochelys, and there are indications of the 

 presence of transverse processes like those of the Pleu- 

 rodira. Purchased. 1859. 



