﻿MONOGRAPH 



ON THE 



Order PTEROSAURIA, 



Having in former Monographs on extinct volant Reptiles defined species (e. g. Ptero- 

 dadylus compressirostris, Pter. Cuvieri, &C.) 1 from the Upper Chalk, and others {e. g. 

 Pterodadylus macronyx) from the Lower Lias, 2 I propose to add to the present 

 Monograph a brief account of evidences of Pterosauria which have reached me from 

 intervening formations of the Mesozoic period. 



§ 1. Pterosauria from the ' Gault' (Plate I, figs. 5 and 6). 



I commence with one from the deposit called ' Gault,' at Folkestone, which is 

 intermediate in age between the Upper and Lower Greensands, from the former of 

 which Pterosaurian remains, remarkable for their great size {Pterodadylus Sedgwickii, 

 e. g.), have been described and figured in the Society's volumes. 3 Examples of the 

 winged order of Reptiles from the present formation have hitherto been very scanty. The 

 first that has been submitted to my examination is the subject of the following descrip- 

 tion, and represents the undernamed species. 



1 ' Monograph on the Fossil Reptilia of the Cretaceous Formations,' Order Pterosauria, Palseon- 

 tographical Society's vol. for year 1851, issued in 1851, p. 80, Pis. XXVII, XXVIII, XXX. 



2 * Monograph on the Fossil Reptilia of the Liassic Formations,' Order Pterosauria, Pal. Soc. vol. for 

 year 1869, issued in 18/0, p. 41, Pis. XVII— XX. 



3 ' Monograph on the Reptilia of the Cretaceous Formations,' Supplement I (Pterosauria), Pal. Soc. 

 vol. for year 1857, issued in 1859, p. 1, Pis. I— III. 



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