74 ICHTHYOPTERYGIA. 



individual ; from the Upper Lias of Whitby, Yorkshire. 

 The type. Noticed by Man tell in his ' Petrifactions/ p. 378, 

 as /. longipinnis. Described, and the skull figured by 

 Owen in his ' Liassic Reptilia ' (Mon. Pal. Soc), pt. iii. 

 p. 121, pi. xxxii. fig. 8. The skull is fairly preserved, 

 and exhibits very clearly the curvature of the alveolar 

 borders of the rostrum ; but the frontal surface is only 

 very imperfectly shown. The pectoral paddle is remark- 

 able for its extreme length ; and has four longitudinal 

 rows of phalangeals. The coracoid is of an elongated 

 form, and shows the absence of a posterior notch; its 

 contour appears to agree closely with that of the specimens 

 No. 32669 (p. 81). Purchased. About 1840. 



15500 a. Slab showing the frontal aspect of a large skull ; from 

 the Upper Lias of Whitby. Although somewhat crushed 

 this specimen exhibits the characteristic ridges on the 

 nasals and the moderately elongated supratemporal fossae ; 

 the curvature of the rostrum is also shown. Same history. 



39454. A young skull, in a somewhat damaged and distorted con- 

 dition ; from the Upper Lias of Whitby. This specimen 

 agrees so closely with the skull of No. 14553 that there 

 can be no doubt as to its specific identity. The charac- 

 teristic curvature of the rostrum, moderately elongated 

 supratemporal fossae, and prominent ridges on the nasals 

 are well shown. Bowerbank Collection. Purchased, 1865. 



R. 792. The imperfect posterior portion of a somewhat larger skull ; 

 from the Upper Lias of Whitby. The frontal region and 

 the right orbit (with its ossified sclerotic) are well pre- 

 served. The moderately elongated and triangular form of 

 the right supratemporal fossa is shown ; and the promi- 

 nent lateral borders of the nasals are also well exhibited. 

 The occipital region is wanting. 



Presented by J. E. Lee, Esq., 1885. 



The following specimens may belong either to this or the 



next 



R. 971. Slab exhibiting the right lateral aspect of the nearly entire 



{Fig.) skeleton of a small individual ; from the Upper Lias of 



Holzmaden, Wiirtemberg. The skull is much crushed, 



and one sclerotic ring has been entirely detached, and is 



shown from the inner aspect. The pectoral girdle is 



