288 CROCODILIAN JAAV PROM THE OXFORD CLAY OF PETERBOROUGH. 



If, then, I am right in regarding the skull in the E5'ebiiry Collec- 

 tion and the figured mandible as belonging to one and the same 

 species, we have evidence of the existence of a Crocodilian allied in 

 cranial characters to Metriorliynclius, but with a shorter and wider 

 skull, furnished with fewer teeth, which have smooth enamel and 

 compressed crowns like those of Geosaurits, while the mandible has 

 no long interval between the 4th and 5th teeth, and thus approxi- 

 mates to MacJiimosaurus. In the width of the palate and mandible 

 this form also seems to approximate to Teleidosaurus of the Puller's 

 Earth, although the latter is at once distinguished by the greater 

 number of teeth and the Steneosauroid type of cranium. 



The foregoing comparisons indicate that we have to do with a 

 Crocodilian allied to MetHorhyncJms, but certainly distinct from all 

 named forms with which I am acquainted. The characters pointed 

 out as distinguishing it from the tj^pical species of MetriorJiynchus 

 seem, moreover, to be sufficiently important to be regarded as of 

 generic value, when we take into account the distinctions on which 

 genera are based in the Crocodilian order. I propose therefore to 

 regard the figured mandible as the type of a new genus and species 

 to be named SiicJiodus durohrivensis, the characters of this genus 

 being those given above. 



I have said that the mandible of Suchodus differs from that of 

 MetriorJiyncTius by the absence of a long interval between the 4th 

 and 5th teeth, and of a distinct terminal expansion ; and the inter- 

 alveolar portion is also wider than in the typical forms of the latter 

 (diagram, fig. 1). When the mandible was in its original shape, it 

 is, however, probable that the interalveolar portion was raised in 

 the same manner above the level of the alveoli. 



