220 SATJROPTERYGIA. 



40449. The centrum and base of the arch of a "pectoral" vertebra; 

 from Potton. Purchased, 1867. 



Specifically undetermined specimens from the 

 Cambridge Greensand. 



35282-3. The associated basioccipital and conjoint atlas and axis 

 vertebras. Purchased, 1859. 



35291-2. The associated articular bones of a mandible. 



Purchased, 1859. 



47263. A rolled propodial bone of medium size. 



Gardner Collection. Purchased, 1876. 



47264. An imperfect propodial of similar dimensions. 



Gardner Collection. 



35275. A smaller humerus (?), with the proximal extremity much 

 waterworn. Purchased, 1859. 



TJie following specimen is from the Tipper Greensand of 

 Port-du-Phone, France. 



33180. A humerus (?) of smaller size than the preceding. 



Purchased. 



Specifically undetermined specimen from the Chalk. 



39437. An imperfect dorsal vertebra ; from the Chalk of England, 

 locality unknown. Dimensions of centrum : — length 0,052 

 (2-05 inches), height 0-055 (2-15 inches), width 0,059 

 (2-35 inches). Boiverbank Collection. Purchased, 1865. 



Cimoliosaurus australis (Owen *). 



Syn. Plesiosaurus australis, Owen 2 . 



Plesiosaurus crassicostatus, Owen 3 . 



Apparently the antipodal representative of C. planus, but attaining 

 somewhat larger dimensions. The thicker ribs of Plesiosaurus 

 crassicostatus can scarcely be regarded as a good specific character 

 even if similar ribs did not belong to the individual indicated by the 

 type specimens. 



Hob. New Zealand. 



1 Eep. Brit. Assoc, for 1861— Trans, of Sections, p. 122 (1862). 



2 Geol. Mag. dec. 1, toI. vii. p. 53 (1870). 



