270 SUPPLEMENT. 



Genus ICHTHYOSAURUS (supra, ii. p. 12). 

 Ichthyosaurus (?) thyreospondylus (swpra, ii. p. 34). 

 R. 1684. The centrum of a caudal vertebra of the short type charac- 

 teristic of this species ; from the Portland Oolite of the 

 Isle of Portland. This appears to be the only Ichthyoptery- 

 gian specimen recorded from the English Portlandian. 



Presented by G. Clifton, Esq., 1889. 



Ichthyosaurus communis (supra, ii. p. 41). 



R. 1996. Slab showing the entire skeleton of a comparatively small 

 individual ; from the Lower Lias of Lyme-Regis. The 

 dorsal aspect of the skull and limbs, and the left lateral 

 aspect of the vertebrae are shown. The contour of the 

 skull is better shown than in other specimens in the 

 Museum. Presented by F. Harford, Esq., 1889. 



R. 1997. Slab showing the right lateral aspect of the skull and 

 cervical vertebrae of an individual agreeing in size with 

 the preceding, and probably referable to this species. 



Presented by F. Harford, Esq., 1889. 



Fig. 65. 



Ichthyosaurus intermedins. — Ventral aspect of part of the left pectoral limb 

 from the Lower Lias of Barrow-on-Soar. hu, humerus ; r, radius : 

 u, ulua ; r', radiale ; i, intermedium ; u' , ulnare ; c, centrale. \ nat. size. 



