plesiosaueid^:. 259 



(1-35 inches), height 0,035 (1*38 inches), width 0,042 

 (1*66 inches). This specimen appears indistinguishable 

 from some of the detached dorsals of the type skeleton, 

 showing the same tall and pear-shaped neural canal. 



Presented hy J. E. Lee, Esq., 1885. 



31876. An imperfect dorsal vertebra of the same general type, but 

 with a relatively shorter centrum, and therefore from a 

 different part of the series ; from Lyme-Eegis. The 

 rugosity of the outer surface is distinctly shown. 



Purchased. 



It. 1330. Slab showing the impression of the right lateral aspect of 

 (Fig.) part of the hinder region of the skeleton of a small 

 Plesiosaur, provisionally referred to this species ; from the 

 Lower Lias of Elston, near Newark, Nottinghamshire. 

 A plaster cast has been taken from the impression to 

 show the contour of the bones. This specimen is de- 

 scribed and figured by "W. Stukeley in the ' Phil. Trans. ' 

 for 1719, pp. 936-8, pi. i., by whom it was suggested that 

 it might be either Crocodilian or Cetacean. It shows the 

 hinder part of the dorsal and the anterior part of the 

 caudal region of the vertebral column, together with por- 

 tions of the pectoral limb. The long and slender contour 

 of the fibula suggests reference to the present species 

 rather than to P. hawlcinsi. 



(?) Presented by the Council of the Royal Society. 



Plesiosaurus eleutheraxon, Seeley \ 



Imperfectly known. Distinguished from the preceding by the 

 smooth vertebras and limb-bones, the separation of the short atlas 

 and axis, and the presence of eight carpal bones. 



This species was founded upon an imperfect skeleton, in which 

 the skull is wanting, from the Lower Lias, preserved in the Wood- 

 wardian Museum at Cambridge, and figured in pi. xiv. of the 

 volume cited. 



Hah. Europe (England). 



41102. Slab exhibiting a pelvic (?) limb ; from the Lower Lias of 

 Lyme-Eegis, Dorsetshire. There are eight tarsal bones, 

 and the dimensions of the femur are: — length 0,215 (8*5 

 inches), width at the distal extremity 0,101 (4-0 inches), 



1 Ann. Mug. Nat. Hist. ser. o, vol. xvi. p, ooo (1865). 



