106 ICHTHTOPTERTGIA. 



' Beschreibung des Ichthyosaurus trigonodon' (Munich, 

 1854). Sharp Collection. Purchased, 1876. 



32700. The centrum of a middle dorsal vertebra probably belonging 

 to this species ; from the Upper Lias of Curcy, near Caen 

 (Calvados), France. This specimen agrees very closely 

 with the corresponding vertebra of I. platyodon ; its 

 transverse diameter being 0,110, the vertical 0,103, and 

 the length 0,041. It is too large to have belonged to an 

 individual of the size of that to which the large Whitby 

 skull (No. E. 1167) of I. zetlandicus pertained; and is 

 relatively shorter than the vertebras of that species. 



Tesson Collection. Purchased, 1857. 



32700 a. The centrum of an apparently associated anterior caudal 

 vertebra; from Curcy. Transverse diameter 0,123, 

 vertical diameter 128, length 0,050. This specimen also 

 closely resembles the caudals of /. platyodon, and is very 

 different from the caudal from Normandy (No. 32694) 

 provisionally referred to I. zetlandicus. Tesson Collection. 



32700 b. The centrum of a later caudal vertebra of the same 

 individual. Tesson Collection, 



Specifically undetermined specimens of ivhich at least a considerable 

 number belong to the Longipinnate group. 



E. 319. The left scapula of an individual agreeing in size with the 

 type of 2". lonchiodon ; from the Lower Lias of Lyme- 

 Eegis. This bone differs very markedly from the scapula 

 of the I. communis group, having the anterior part of the 

 coracoidal articulation curved upward so as to form a 

 nearly symmetrical line with the dorsal border of the 

 glenoidal cavity. It may belong to /. lonchiodon. 



Enniskillen Collection. Purchased, 1882. 



32396. A smaller left scapula of similar general contour; from 

 Lyme-Eegis. Closely resembles the corresponding bone of 

 the skeleton of I. tenuirostris, No. 38522, to which species 

 it may belong. Purchased, 1857. 



46563. A larger scapula of similar general type, but with the 

 anterior border emarginate ; from Lyme-Eegis. 



Purchased, 1875. 



E. 1175. Slab showing the dorsal aspect of a left scapula of the type 

 of No. 32396, but smaller; from Lyme-Eegis. No history. 



