96 ICHTHYOPTERYGTA. 



the orbit to a point some six inches in advance of the 

 nares, is well preserved ; as is also the corresponding por- 

 tion of the left dentary bone. The broken anterior surfaco 

 has been cut and polished to exhibit a section of the com- 

 ponent bones and the teeth. The nares are of compara- 

 tively small size. The specimen was collected by Miss 

 Mary Anning. Purchased, 1821. 



R. 215. The slightly imperfect skull of a very large individual ; from 

 Lyme-Regis. The right lateral aspect is in a very fine 

 state of preservation, but the sclerotic plates have been 

 crushed in. The teeth show the characteristic features of 

 the species. Presented by F. Seymour Haden, Esq., 1882. 



. 1153. Plaster cast of the imperfect skull of a very large indi- 

 vidual. The original was obtained from Lyme-Regis, and 

 is preserved in the Museum of the Geological Society. 

 The postorbital portion is wanting, and the rostrum has 

 been twisted to one side, and broken into several segments. 

 The left orbital region is well preserved. 



Presented by the Council of the Geological Society. 



R. 1154. Slab exhibiting the ventral aspect of the mandible 

 together with portions of the vertebral column, and other 

 bones of a very large individual ; from Lyme-Regis. This 

 specimen was named by Conybeare variety immanis. 



Purchased. 



R. 1158. The nearly entire skull, with the anterior part of the ver- 

 (Fiy.) tebral column, ribs, and the left pectoral girdle, of a com- 

 paratively large individual ; from the Lower Lias between 

 Lyme-Regis and Charmouth. The skull was dug up in 

 the year 1812, and the other portion in the following year 

 at a distance of some feet from the spot where the skull 

 lay. The teeth are considerably damaged, but the first two 

 or three on the right side of the extremity of the rostrum 

 exhibit the characteristic compressed and carinated crowns; 

 and the contour of some of the crowns of the teeth on the 

 posterior part of the left side of the rostrum is also charac- 

 teristic of the species. The left lateral and the greater 

 part of the frontal aspect of the skull are well preserved, 

 but the right orbital region is wanting, and the contour of 

 the supratemporal fossae is not shown. The neural arches 

 of the vertebrae are wanting. The entire specimen is 

 figured by Home in the ' Phil. Trans.' for 1814, pis. xvii.- 



