IGTJANODONTID^. 239 



extremity of the dorsal series. This specimen was probably 

 associated with No. E. 142 ; it shows a distinct ball on 

 the anterior face of the centrum, below which is a well- 

 marked haemal spine. 



R. 166. The centrum of a very similar vertebra, with a less distinct 

 haemal spine. 



R. 142 a. An imperfect anterior dorsal vertebra. The anterior face 

 of the centrum is flat, but the posterior cupped. All the 

 specimens entered as R. 142 were associated with the 

 present one. 



R. 142 b. An imperfect anterior dorsal vertebra. There is still a 

 trace of the posterior cup to the centrum. 



R. 142 C. A slightly imperfect anterior or middle dorsal vertebra. 

 This specimen was evidently somewhat later in the series 

 than the preceding one, the two faces of the centrum 

 being alike. 



R. 142 d. A slightly imperfect anterior or middle dorsal vertebra. 



R. 142 e. A more imperfect anterior or middle dorsal vertebra. 



R. 142. A slightly imperfect anterior or middle dorsal vertebra. One 

 {Fig.) of the type specimens. Figured by Seeley in the ' Quart. 

 Journ. Geol. Soc' vol. xxxix. pp. 58, 59, figs. 2, 3 ; the 

 former figure being reproduced in the woodcut on the next 

 page. There is a slight cupping of the posterior face of 

 the centrum. 



R. 143 b. An imperfect anterior or middle dorsal vertebra. Asso- 

 ciated with No. R. 143. 



R. 135 a. An imperfect anterior or middle dorsal vertebra, probably 

 belonging to this form. 



28935 . A series of four united posterior dorsal or lumbar vertebrae 



probably belonging either to this species or to I. mantetti. 



Hastings Collection. Purchased, 1855. 



R, 165. A posterior dorsal or lumbar vertebra, with the arch im- 

 perfect, not improbably belonging to this form. The 

 centrum has subcircular terminal faces. 



