PLESI0SATJKIDJ3. 189 



fiuviatile or estuarine habits. The unnamed vertebra from the 

 German Wealden figured by Koken in the ' Pal. Abhandl.' vol. iii. 

 pt. v. pi. v. fig. 4, belongs to the present species. 

 Rah. Europe (England and German)'). 



R. 609. A large series of cervical, dorsal, and caudal vertebrae, 

 (Fig.) mostly wanting the neural arches, of which the greater 

 number belong to a single individual ; from the Wadhurst 

 Clay (Lower Wealden) of Hastings, Sussex. The types. 

 A nearly entire late cervical is figured in the accompanying 

 woodcut ; the arch is anchylosed to the centrum, but the 

 ribs were loose and have been lost. The dimensions of 

 the centrum are :— length 0,023 (0-9 inch), height 0,032 

 (1-26 inches), width 0,035 (1-37 inches); the height from 

 the base of the neural canal to the summit of the spine 

 being 0,047 (1*85 inches). The lowness of the spine and 

 the cupped centrum at once distinguish this specimen 

 from the cervical of O. limnophilus, No. 2429 (p. 225). 

 In one of the dorsals (No. B,. 609 a) the dimensions of the 

 centrum are :— length 0,024 (0-95 inch), height 0,033 

 (1*33 inches), width 0,044 (1'75 inches). A series of 

 similar vertebras from Hastings is preserved in the Museum 

 of Practical Geology, Jermyn Street. 



Dawson Collection. Purchased, 1884. 



36549. A nearly entire later cervical vertebra of slightly larger size 

 than the figured cervical of the preceding series ; from the 

 Wealden of Cuckfield, Sussex. In this specimen both the 

 arch and ribs are completely anchylosed to the centrum, 

 with obliteration of the sutures. The general contour is 

 very similar to that of the cervicals of C. bemardi. 



Mantell Collection. Purchased, 1853. 



2439. The centrum and base of the arch of a dorsal vertebra closely 

 resembling No. E. 609 a ; from Cuckfield. 



Mantell Collection. Purchased, 1838. 



2434. The centrum of an anterior caudal vertebra probably referable 

 to this species ; from Cuckfield. Mantell Collection. 



40549. The left humerus imperfect distally ; from Cuckfield. The 

 general characters of the proximal extremity resemble 

 those of the humerus of C. trochanterius, but the proximal 

 extremity of the trochanter is less developed. 



Mantell Collection. Purchased, 1853. 



