ICHTHYOSAURID^:. 33 



normal two bones. In one limb the entire anterior 

 border of the radius is shown, which also exhibits the 

 transversely elongated form characteristic of the gronp. 



Presented by J. 0. Mansel-Pleydell, Esq., 1871. 



46497 a. Proximal portion of the right pelvic limb ; from the Kime- 

 {Fig.) ridge Clay of Kimeridge Bay. The femur, tibia, fibula, 

 tibiale, and intermedium remain in their natural positions. 

 The femur exhibits a prominent trochanteric ridge on the 

 dorsal aspect ; and the tibia is transversely elongated, and 

 shows an entire anterior border. The specimen agrees 

 precisely with the imperfect pelvic limb of the type 

 skeleton. The femur (woodcut, fig. 16) exhibits the 

 elongated form and moderate expansion of the postaxial 

 surface characteristic of the corresponding bone of the 

 type specimen. 



Presented by J. C. Mans el- Pley dell, Esq., 1875. 



R. 1197. Slab showing portion of a skeleton probably belonging to 

 this species ; apparently from the Kimeridge Clay, locality 

 unknown. The remains comprise the imperfect centra of 

 seven anterior caudal vertebrae, a number of terminal 

 caudals, the imperfect pelvis, and a considerable portion 

 of the left pectoral limb. The contour of the anterior 

 caudals accords exactly with that of the type. The 

 humerus shows a strongly marked trochanteric ridge and 

 cannot be distinguished from the corresponding bone of 

 the type. The radius is in apposition and shows the 

 entire anterior border and transversely elongated contour ; 

 the intermedium is slightly displaced, the ulna wanting, 

 and the remaining bones in cunfusion. No history. 



46473 e. An associated series of thirty-five vertebral centra provi- 

 {biy.) sionally referred to this species; from the Kimeridge Clay 

 of Foxhangers, near Devizes, Wiltshire. This series 

 comprises cervicals, dorsals, and caudals ; and the follow- 

 ing specimens have been figured by Owen in his ' Liassic 

 Eeptilia ' (Mon. Pal. Soc), pt. iii. pi. xxii. (1881), viz. : — 

 a cervical in figs. 1,2; an anterior dorsal, which-has been 

 bisected in a vertical antero-posterior plane, in figs. 4-0 

 (also in woodcut, fig. 3, p. 4 of this volume) ; a posterior 

 dorsal in figs. 7, 8 ; and a caudal in figs. 0-11. The 

 terminal faces of the cervicals and middle dorsals are 

 slightly elongated transversely, and those of the posterior 



PAUT II. i> 



