ICHTHYOSIURIDJE. 



91 



very imperfect. Impressions of the surface of the skin 

 are shown in the matrix. This specimen is described by 

 Owen in his ' Liassic Eeptilia,' pt. iii. p. 119, and the con- 

 joint atlas and axis vertebras are represented in pi. xxiii. 

 fig. 6, and the coracoids in pi. xxxii. fig. 9. 



Purchased, 1864. 



36182. Slab exhibiting the right lateral aspect of a nearly entire 

 {Fig.) skeleton ; from the Lower Lias of Barrow-on-Soar. The 

 type of /. Jongirostris, Owen. Figured by Owen in his 

 'Liassic Eeptilia' (Mod. Pal. Soc), pt. 3, pi. xxxii. fig. 7. 

 The skull is nearly perfect, and has the sclerotic ossifications 

 beautifully preserved. Both scapulae are well preserved, 

 but the coracoids are not apparent. The limbs of the right 

 side are nearly entire. The extremity of the rostrum is 

 wanting, but the portion remaining is equal to nearly five 

 times the diameter of the orbit. The skull is represented 

 in woodcut, fig. 31. The right limbs are figured by Owen 

 in his ' Liassic Eeptilia,-' pi. xxxii. fig. 4 (reversed), under 

 the name of F. tenuirostris, his figure of the pectoral limb 

 being reproduced in fig. 32. The narrower and less ex- 

 panded form of the humerus characteristic of the species 

 can be well seen by comparison with that of the skeleton 

 of /. tenuirostris, No. II. 498. In the following specimens 

 the humerus is abnormally widened by pressure. 



Purchased, 1861. 



14566. Slab showing the dorsal aspect of an imperfect skeleton ; 



{Fig.) from the Upper Lias of Whitby, Yorkshire. The entire 

 skull remains in a damaged condition, and the greater 

 part of the vertebral column ; but of the limbs only the 

 proximal portion of the right pectoral remains. Mentioned 

 by Mantell in his ' Petrifactions,' p. 385. Tho dorsal aspect 

 of the skull is figured by Owen in his ' Liassic Eeptilia,' 

 pt. iii. pi. xxxii. fig. 8, as I. longirostris. Tho length of 

 the rostrum is about G£ times the diameter of the orbit. 



Purchased. 



36876. The imperfect skull of a very large individual ; from the 

 Upper Lias of Whitby. The left orbit, with the discon- 

 nected sclerotic bones, and a large portion of the extremely 

 elongated cranial rostrum, are well preserved. 



Purchased, 1862. 



R. 1152. The imperfect posterior portion of a crushed cranium ; 

 probably from the Lower Lias of Barrow-on-Soar. The 



