ICHTHYOSAUEID^. 103 



1151*. The centrum of a very large anterior caudal vertebra ; from 

 Lyme-Regis. This specimen agrees with the centrum 

 marked 36 in No. 481 , and is said to belong to the same 

 individual. Purchased. 



R. 315 b. The imperfect centrum of a rather smaller anterior caudal 

 vertebra ; from Lyme-Regis. Enniskillen Collection. 



R. 1170. The centrum of an anterior caudal vertebra ; from Lyme- 

 Regis. This specimen differs from the preceding in the 

 absence of distinct narrowing superiorly, and in this 

 respect agrees with the centrum marked 37 in No. 481, 

 which it somewhat exceeds in size. No history. 



R. 314. The centrum of a somewhat water-worn middle caudal 

 vertebra ; probably from Lyme-Regis. This specimen 

 cannot be distinguished from the one marked 59 in 

 No. 481. Enniskillen Collection. 



R. 1171. The centrum of a later caudal vertebra; from Lyme- 

 Regis. Closely resembles the centrum marked 68 in 

 No. 481. No history. 



R. 1171 a. The centrum of a very similar caudal vertebra ; from 

 Lyme-Regis. The chevron -facets are unusually distinct. 



No history. 



18971. An entire rib of a very large individual; from the Lower 

 Lias of Watchet, Somersetshire. This specimen indicates 

 an individual fully double the dimensions of the skeleton, 

 No. 2003*. Purchased, 1845 



R. 1195. A smaller rib, probably belonging to this species ; from 

 the Lower Lias, locality unknown. No history 



R. 1195 a. Two smaller ribs, perhaps belonging to this form. 



No history. 



R. 219. Slab showing the dorsal aspect of the right scapula of a 

 very large individual ; from Lyme-Regis. This specimen 

 is considerably larger than the scapula of No. 481. 



Purchased, 1882. 



R. 1172. Two slabs showing an imperfect pectoral and pelvic limb 

 and an associated femur of a very large individual ; from 

 Lyme-Regis. In the pectoral limb the humerus articulates 

 in the normal way with the radius and ulna; but in the 



