VUl 



MAEINE EEPTILES OF THE OXFOED CLAT. 



There seems to be a little uncertainty as to the conditions under which these beds 

 were deposited. They are usually supposed to have been laid down in fairly deep 

 water, but the presence of remains of land-reptiles, and perhaps the occurrence of 

 large masses of lignite, may indicate that the coast was not far off. Probably they 

 were mud-banks accumulating off the mouth of a large stream. 



In the Collection at the British Museum (Xat. Hist.) there are remains of the 

 following Vertebrates collected from the series of clays just enumerated : — 



Keptilia. 



Cetiosaurus leedsi, Hulke, sp. 

 Omosaurus durobrivensis, Hulke. 

 A large Stegosaurian. 

 Camptosaurus leedsi, Lydekker. 

 Sarcolestes leedsi, Lydekker, 

 jRhamphorJipicJms sp. 

 Ophthalmosaurus icenicus, Seeley. 

 Murcenosaurus leedsi, Seeley. 



„ durobrivensis, Lydekker. 



„ platyclis, Seeley. 



Picrodeidus heloclis, Seeley, sp. 



„ sp. 



Tricleidus seeleyi, Andrews. 

 Cryptodeidus oxoniensis, Phillips, sp. 



Pliosaurus ferox, Sauvage, sp. 

 Simolestes vorax, Andrews. 

 Peloneustes pldlardius, Seeley. 

 MetriorliyncJms superciliosus, Deslongchamps. 



„ bradiyrhyndms, Deslongchamps. 



sp. 

 Sudiodus durobrivensis, Lydekker. 

 Daeosauriis sp. 

 Steneosaurus edwardsi, Deslongchamps. 



„ leedsi, Andrews. 



„ nasutus, Andrews. 



,, durobrivensis, Andrews. 



„ obtusidens, Andrews. 



It is possible that the number of species of Crocodiles may be increased when the 

 material is examined later in detail. It is a very remarkable circumstance that no 

 trace of any Chelonian has been found. 



Pisces. 



Hybodus obtusus, Agassiz. 

 Asteracantlius ornatissinius, Agassiz, 



Jlettonensis, A. S. Woodw^ard. 

 Padiymylus leedsi, A. S. Woodward. 

 Bradiymylus altidens, A. S. Woodward. 

 Ischyodus efferloni, Buckland, sp. 



„ heaumonti, Egerton. 

 Lepidotus leedsi, A. S. Woodward. 



„ latifrons, A. S. Woodward. 



„ macroduirus, Egerton. 



var. 



HeterostropTius sp. 

 Mesturus leedsi, A. S. Woodward. 

 Caturus sp. 1. 

 „ sp. 2. 

 Osfeoraehis leedsi, A. S. Woodward. 

 JEurycorinus egertoni, Egerton, sp. 

 Hypsocormus leedsi, A. S. Woodward. 



„ tenuirostris, A. S. "\A''oodward. 



Leedsia problematica, A. S. Woodward. 

 Pholidopliorus sp. 



