PLESIOSAUEID.E. 215 



**Cimoliosaurus smithi (Owen x ). 



Syn. Plesiosaurus smithi, Owen 2 . 



A doubtful species, founded upon a dorsal vertebra from the Upper 

 Chalk which appears to resemble those of C. constrictus, but is of 

 smaller size ; the dimensions of the centrum being : — length 0,047 

 (1-87 inches), height 0,064 (2*5 inches), width about 0,081 (3-4 

 inches). 



Hah. Europe (England). 



49007. An associated series of phalangeals probably belonging to 

 {Fig.) this species; from the Upper Chalk of Burham, Kent. 

 Figured by Owen in his ' Cretaceous Eeptilia,' pt. i. 

 pi. xix. These specimens were probably associated with 

 the dorsal vertebra figured in pi. xvii. of the same memoir, 

 which was subsequently made the type of Plesiosaurus 

 smithi. Purchased, 1878. 



R. 30. Two phalangeals of similar type ; from the Grault of Folke- 

 stone. These specimens may belong to the preceding 

 species. Gardner Collection. Purchased, 1880. 



Cimoliosaurus haasti (Hector 3 ). 

 Syn. Mauisaurus haasti, Hector 4 . 



The type of Mauisaurus. Apparently closely allied to C. 

 constrictus ; but with a shorter and more expanded humerus, 

 and perhaps also distinguished by certain vertebral characters 

 noticed below. This species may possibly prove to be inseparable 

 from Elasmosaurus platyurus, Cope 5 , the type of that genus. In 

 describing the latter in an advance separate copy 6 from the ' Trans. 

 Amer. Phil. Soc' vol. xiv. pt. i. pp. 42-52, pis. ii., iii. (1869), 

 Cope placed the skull at the caudal extremity of the body, and 

 described (p. 42) the vertebras as having the prezygapophyses directed 

 downwards, the pectoral and pelvic girdles being likewise trans- 

 posed. In the final issue (1870) both tho description and plate 

 were amended, but there still seems to be some discrepancy regarding 

 caudal and cervical vertebra?. 



Hah. New Zealand. 



1 Erit. Foss. Rep. vol. iv„ Index, p. iv (1884). — Plesiosaurus. 



2 Loc. cit. 



3 Trans. N. Zealand Inst. vol. vi. p. 346 (1874). — Mauisaurus, 

 % Loc. cit. 



9 Proc. Ac. Nat. Sci. Philad. for 18G8, p. 93 (1868). 

 G In library of British Museum (Nat. Hist.). 



