PLESIOSAURID^. 277 



39850. A medium-sized vertebra from the "pectoral" or lumbar 

 region, with the summit of the neural spine displaced ; 

 from Charmouth. Purchased. 



R. 807. Four imperfect vertebrae from the " pectoral" region of a 

 medium-sized species ; from Lyme-Regis. These specimens 

 have the left lateral aspect covered by matrix. No history. 



R. 1376. A vertebra from the " pectoral " or lumbar region, wanting 

 the neural spine ; from Lyme-Regis. No history. 



18970. The centrum and base of the arch of a " pectoral " or lumbar 

 vertebra of a large species ; from the Lower Lias of 

 "Watchet, Somersetshire. The centrum is relatively short. 



Purchased, 1853. 



2046*. Two later caudal centra of a comparatively large form ; pro- 

 bably from Lyme-Regis. 



Hawkins Collection. Purchased, 1834. 



2041*. Slab showing the imperfect anterior portion of the left side 

 {Fig.) of the pectoral girdle and the humerus of the same side 

 of a small form ; from the Lower Lias, probably of Street, 

 Somersetshire. Described and figured by Seeley in the 

 ' Quart. Journ. Geol. Soc' vol. xxx. p. 446, fig. 10, and 

 referred to Eretmosaurus. The distal portion of the 

 humerus underlies the scapula, and the latter has been so 

 crushed down upon the former as to be almost welded with 

 it, although its lateral borders can be distinctly traced. 

 The postaxial border of the distal extremity of the scapula 

 is in contact with the antero-external angle of the coracoid, 

 and owing to the effects of pressure appears as though it 

 articulated with it. In the figure and description the 

 humerus and the anterior part of the scapula have been 

 regarded as a single bone and described as the scapula ; 

 the proximal portion of the scapula being figured as a part 

 of the coracoid. The suture between the scapula and the 

 coracoid is plainly visible, the division drawn in the figure 

 in the middle of the former being merely a fracture ; the 

 small foramen described in the coracoid is likewise merely 

 a vacuity on a line of fracture. The specimen may be 

 referable to P. hawkinsi. Hawkins Collection. 



R. 1373. The right scapula of a comparatively small form ; from 

 Lyme-Regis. This specimen, of which the ventral surface 

 is imperfect, not improbably belongs to J\ dolichodirus. 



No hist Or n. 



