72 ICSTHYOPTERYGTA. 



has an entire anterior border, and the nlnare has a peculiar 

 polygonal contour and oblique position which is very cha- 

 racteristic. The radiale has a very small notch in the 

 anterior border. The coracoid shows a small anterior 

 notch, of which there is only a trace in the specimen 

 figured by Wagner ; but its size may have been somewhat 

 increased by pressure. The femur is totally different from 

 that of 7". communis and its allies, and approximates to 

 that of i". tenuirostris (fig. 26). 



Sharp Collection. Purchased, 1876. 



Ichthyosaurus, sp. 



The following Lower Liassic specimens indicate a form allied 

 either to I. integer or to J. acutirostris. 

 Hob. Europe (England). 



33178. Slab exhibiting the dorsal aspect of a medium-sized left 

 pectoral limb, agreeing in general characters with the one 

 noticed under the head of 1. integer ; from the Lower 

 Lias, probably of Barrow-on-Soar, Leicestershire. The 

 radius and the other bones of the anterior border have a 

 small marginal notch. Purchased. About 1844. 



28327. A pair of crushed coracoids, not improbably specifically 

 identical with the preceding; from the Lower Lias of 

 Lyme-Eegis, Dorsetshire. With the exception of having 

 a rather deeper anterior notch, these specimens closely 

 resemble the coracoid of /. integer figured by Wagner in 

 the ' Abh. k.-bay. Ak. Wiss.' vol. vi. pt. 2, pi. xvi. fig. 1. 



Purchased, 1853. 



R. 269 a. A rather larger right coracoid of apparently the same 

 type as the preceding ; from Lyme-Eegis. 



Egerton Collection. Purchased, 1882. 



49203. A skull apparently belonging to the present group, but 

 differing from those of all named species, and therefore 

 perhaps belonging to the present form ; from the Lower 

 Lias of Lyme-Eegis. The hyoids are shown ; and a mass 

 of matrix attached to the occiput contains a scapula, the 

 atlas and axis, and several other vertebral centra ; the 

 latter are subpentagonal and cordiform and deeply cupped. 

 A vertical crush has elongated the orbit in an antero- 

 posterior direction ; but the sclerotic ossifications are 

 beautifully preserved. The relatively large orbits and 



