ICHTHroSAUKID^. 85 



R. 1123. Slab showing the right lateral aspect of an imperfect 

 skeleton ; from the Lias, locality unknown. The skull, 

 dorso-lumbar region of the vertebral column, and the 

 greater portion of both pectoral limbs are preserved. The 

 skull is very imperfect. The anterior border of the radiale 

 is entire. No history. 



2011 *. Slab showing a considerable portion of the vertebral column, 

 (Fig.) detached vertebral centra, ribs, portions of the limbs, and 

 teeth of this or the next species ; from the Lower Lias of 

 Keinton, Somersetshire. The imperfect and anchylosed 

 radius and ulna are preserved in contact with a fragment 

 of the humerus, and afford the grounds of specific deter- 

 mination. One femur is preserved and has facets for the 

 attachment of three bones distally; the tibia is absent, but 

 the other two bones of the same row are in position, the 

 middle one of the original three being almost certainly 

 the intermedium. A tendency to the upthrusting of the 

 latter bone is seen in the pelvic limb of No. E. 498, and 

 in the large skeleton of 1. platyodon. Figured by Haw- 

 kins in his ' Sea Dragons,' pi. xv. Hawkins Collection. 



R. 1124. A broken slab exhibiting an imperfect mandible, a quad- 

 rate, a number of vertebras and ribs, the coracoids, 

 scapulas, and the ventral aspect of the proximal portion of 

 the left pectoral limb ; probably from Street. The 

 pectoral limb exhibits the humerus, radius, ulna, and 

 intermedium in their natural position ; which have all 

 the characters of the present species. The mandible and 

 scapula are more like those of /. intermedins, and there 

 may be remains of two species on the slab. 



? Same history. 



R. 1125. Slab showing the ventral aspect of an imperfect skull, and 

 of the right coracoid, scapula, and greater portion of the 

 pectoral limb ; from the Lias, locality unknown. The 

 humerus is wanting, but the characteristic features of the 

 other bones of the paddle are well shown. No History. 



R. 1121. Slab exhibiting the caudal region of the vertebral column, 

 both limbs of the right side, and the pelvic of the left ; 

 probably from Street. The right pectoral limb is shown 

 from the dorsal, and the right pelvic from the ventral 



