Manchester Memoirs, Vol. liv. (1910), No. 11. 11 



Syste»iat!c /position of the specimen. 



As Owen and Blake recognized there is no doubt of 

 the specific distinction of the specimen from all other 

 described species. The specimen although apparently a 



Fig. 8. " Plesiosaurtis" propinqiius. Left femur, dorsal aspect. y.\. 



complete skeleton shews so few of its important characters 

 that it is very difficult to compare it with others. Practi- 

 cally speaking only the general proportions, the skull and 

 the arches of the cervical vertebrae, are available for 

 comparison. 



In point of relative dimensions the species comes near 

 to " Thauntatosaurus" niegacephalus Stutchbury, of the 

 Lower Lias, and Rhomaleosaurus Craniptoni of the Upper 

 Lias. 



