SUPPLEMENT (No. lY)* 



TO THE 



MONOGRAPH 



OF 



THE FOSSIL REPTILIA 



OF THE 



CRETACEOUS FORMATIONS. 



Order— SAUROPTERYGIA, Owen. 

 Genus — Plesiosaurus, Conyheare. 



In former Monographs and works are given descriptions of the following 

 species of Plesiosaurus from Cretaceous deposits : 



Plesiosaurus constrictus, Owen. ' Dixon's Geology and Fossils of the Tertiary 



and Cretaceous Formations of Sussex,' 4to, 

 1850, p. 398, pi. xxxvii, figs. 6 and 7. 

 From Steyning Chalk-pit, Sussex. 

 Plesiosaurus Bernardi, Owen. Op. cit., p. 396, pi. xxxvii, figs. 8, 9. From 



the Upper Chalk, Houghton Pit, near 

 Arundel, Sussex. 

 Plesiosaurus pachyomus, Owen. Monograph, Palaeontographical Society, 4to, 



1851, p. 64, tabs, xx, xxi. From the Upper 

 Greensand at Reach, near Cambridge. 

 Plesiosaurus latispinus, Owen. 'Descriptive Catalogue of the Fossil Remains 



of Reptilia and Pisces in the Museum of 

 the Royal College of Surgeons of England,' 

 4to, 1854, p. 63, No. 251. 



* This Memoir was given as ' Supplement No. II,' in the volume for 1862. 



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