PLESIOSATJEID^. 



243 



Cimoliosaurus brevior, Lydekker, n. sp. 



A provisional species based on cervical vertebrae, which are 

 relatively shorter than in C. truncatus, but not so short as in 

 C. richardsoni. 



Hah. Europe (England). 



41955. The centra of six associated immature middle cervical ver- 

 (Fig.) tebrae ; from the Kimeridge Clay of "Weymouth, Dorset- 

 shire. These specimens are the types. The dimensions of 

 the specimen represented in the accompanying woodcut 

 are:— length 0,041 (1-57 inches), height 0,046 (1'74 

 inches), width 0,059 (2-35 inches). Smaller vertebrae from 

 the Oxford Clay in the collection of Mr. Leeds show similar 

 proportions. Purchased, 1870. 



Fi£. 75. 



Cimoliosaurus brevier. — Anterior and left lateral aspects of the centrum of an 



immature cervical vertebra ; from the Kimeridge Clay of Weymouth, f . 



co, costal facet. 



41776. The centra of a middle and a posterior cervical and of a 



" pectoral " vertebra, probably specifically identical with 



the preceding ; from tho Kimeridge Clay of Weymouth. 



Purchased, 18G9. 



Sj>ecificalhj Undetermined Specimens. 



32410. The centrum of an immature " pectoral " vertebra ; from 



the Kimeridge Clay of Boulogne, France. This centrum is 



short and has a prominent hsemal ridge. Purchased, 1857. 



47169. An imperfect associated cervical and " pectoral" vertebra ; 

 from the Cornbrash (Lower Jurassic) of Stilton, Northamp- 

 tonshire. These specimens belong to a small but adult 

 individual, and have the centrum of medium length. 



Sharp Collection. Purchased, 1S7G. 



32702. The imperfect centrum of a late cervical vertebra; from the 

 Oxford Clay of Vachcs-Noires (Calvados), FraDce. 



TeSSOn Collation. L'urcha Bed ', L857. 



b2 



