24 ICHTHYOPTEEYGIA. 



R. 270. An entire tooth of similar type ; from the Kimeridge Clay 

 (Fig.) of Shotover, Oxfordshire. This tooth (fig. 12) may have 



been associated with the vertebra No. E. 271, with which 



it agrees in mineral condition. 



Egerton Collection. Purchased, 1882. 



11265. The conjoint atlas and axis vertebrae of a comparatively large 

 individual ; from the Kimeridge Clay, locality unknown. 

 This specimen may belong either to this or to one of the 

 following forms. Mantell Collection. Purchased, 1838. 



47327. The centrum of an anterior cervical vertebra; from the 

 Kimeridge Clay of Swindon, Wiltshire. This specimen 

 agrees precisely, both in size and proportions, with the 

 vertebra (which may be taken as the type) figured by 

 Phillips in his ' Geology of Oxford,' p. 335. The vertical 

 diameter of the anterior face is 0,081, the transverse 

 0,076, and the length 0,041. The upper costal articula- 

 tion is partly confluent with the neural facet, and both 

 faces are equally cupped. 



Presented by the Directors of the Swindon 

 Brick and Tile Company, 1873. 



47327 a. The centrum of a somewhat later cervical vertebra, asso- 

 ciated with the preceding. Same history. 



. 24684. The centrum of an anterior dorsal vertebra ; from the 

 Kimeridge Clay of Wootton-Bassett. This specimen ac- 

 cords in relative length with the somewhat later centrum 

 figured by Phillips, op. cit. p. 336. 



Cunnington Collection. Purchased, 1849. 



R. 1305. A very similar centrum ; from the Kimeridge Clay, locality 

 unknown. No history. 



R. 271. The centrum of a smaller anterior dorsal vertebra; from 

 the Kimeridge Clay of Shotover. Vertical diameter 0,078 

 (3-1 inches), transverse 0,084 (3-3 inches'), length 0,038 

 (1*5 inches). Egerton Collection. 



24684 a. The centra of one anterior and two middle dorsal vertebrae 

 of rather smaller dimensions, provisionally referred to this 

 species ; from Wootton-Bassett. The length is unusually 

 great. Cunnington Collection. Purchased, 1849. 



24684 b. The centrum of a medium-sized middle dorsal vertebra ; 

 from the Kimeridge Clay of Wootton-Bassett. The ter- 



