﻿MONOGRAPH 



ON THE 



Genus CETIOSAURUS. 1 



§ 1. Cetiosaurus from the Great Oolite. 



Species — Cetiosaurus longus, Ow. (Plate X, and Woodcuts 1 — 10). 



Until a comparatively recent period the generic or family characters of the great 

 extinct Cetiosauroid Reptiles were founded on a few scattered bones of the trunk and 

 limbs. The texture of these fossils mainly differentiated them from the corresponding 

 vertebras and limb-bones of previously determined genera or species of Saurians. No 

 portion of the skull, not one tooth, had been discovered so associated with Cetiosaurian 

 bones, at the date of my " Reports on British Fossil Reptiles," 2 as to throw any additional 

 light on the ordinal affinities of the new genus. I had not, then, grounds for dissociating 

 it from the Crocodilian group or order. The grand accession of evidences of the osseous 

 framework of one of the species 3 added to the original collection by Buckland, preserved 

 in his Museum at Oxford, by his eminent successor, the late lamented Professor Phillips, 

 by whom they have been instructively elucidated in his excellent work on the ' Geology of 

 Oxford,' 4 has proportionally advanced the means of determining the ordinal relations and 

 affinities of the genus. The inferences which may be drawn in favour of the Dinosaurian 



1 Gr. /ojreios, cetaceous ; cavpos, Lizard ; " Report on British Fossil Reptiles," Part ii, in ' Reports of 

 the British Association,' &c, for the year 1841 ; also ' Proceedings of the Geological Society of London' 

 for June, 1841 (vol. iii, p. 457). 



2 ' Reports of the British Association for the Advancement of Science ' for the years 1839 and 1841. 



3 " Cetiosaurus longus" lb., 'Report ' of 1841, p. 101. 

 * Svo, 1871. 



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