plesiosaukid^;. 217 



47343. Cast of the bones of the right pectoral limb. The original 

 is one of the types, and was obtained from Amnri Bluff ; 

 it is preserved in the Museum at Wellington, and is figured 

 by Hector, op. cit. pi. xxix., "with some inaccuracies of detail. 

 This specimen was associated with the coracoids figured on 

 the same plate. The humerus has a length of 0,340 (14*0 

 inches) and a distal diameter of 0,280 (8*2 inches). The 

 head is spherical, and there is a very prominent proximal 

 trochanter ; while there is a distinct rugosity below the 

 head, and the distal extremity is equally expanded on 

 both borders. In the humerus of O. constrictus (lielmerseni), 

 figured by Kiprijanoff in the ' Mem. Ac. Imp. St. Peters- 

 bourg,' vol. xxx. art. 6, pi. xiv., the contour of the proximal 

 extremity is similar, but the shaft is relatively longer, and 

 the distal expansion of the preaxial border much less 

 marked than the postaxial. The radius and ulna are 

 laterally expanded. 

 Presented by the Director of the Wellington Museum, 1876. 



R. 830. Slab showing the distal extremity of the femur, the entire 

 fibula, and some other bones of the paddle ; from Amuri 

 Bluff. The femur has the postaxial border more expanded 

 than the preaxial. The fibula is less expanded in a trans- 

 verse direction than the ulna, and resembles the corre- 

 sponding bone of the European species figured by Kipri- 

 janoff, op. cit. pi. xiv. fig. 2. 



By exchange with the Wellington Museum, 1880. 



R. 830 a. A series of detached phalangeals ; from Amuri Bluff. 



By exchange with the Wellington Museum, 1880. 



Cimoliosaurus planus (Owen *). 

 Syn. Plesiosaurus planus, Owen 2 . 



Plesiosauras pachyomus, Owen 3 (in parte). 



A comparatively small species, apparently allied to C. constrictus, 

 but with the centra of the vertebrae, especially in the hinder cervical 

 and dorsal regions, relatively shorter, and their terminal faces 

 perhaps somewhat flatter, and (so far as can be determined) ellip- 

 soidal throughout a great part of the series. The anterior or middle 

 ecrvicals are absolutely much longer than the posterior cervicals and 

 dorsals. 



1 Cretaceous Rcptilia (Mon. Pal. Soc), suppl. iv. p. 2 (1864). — Plesiosaurus. 



2 Loc. cit. Ibid. ]»f. i. pi. xxi. fig. 1 (1851). 



