Greensand Dinosaurs 61 



saurus curtonotus, of which a considerable series of associated 

 remains is known, its describer 1 gives practically no informa- 

 tion with regard to its systematic position ; other bones have 

 been named A . major. The same may be said of Eucercosaurus 

 tanyspondylus 1 ) which was a reptile of considerable size. 

 Macrurosaurus semnus was a smaller type, taking its name 

 from the great length of the tail, the only part definitely 

 known. Another series of tail vertebrae has been described 

 as Syngonosaurus macrocercus 3 , and appears to indicate a type 

 allied to Eucercosaurus. The toothless fragment of an upper 

 jaw described by Prof. Seeley 4 as Priodontognathus phillipsi, 

 is regarded as indicating an armoured dinosaur allied to 

 the Wealden Hylaeosaurus. Vertebrae in the Sedgwick 

 Museum have been made the type of the genus Stereosaurus 

 by the same writer 5 , with the species cratynotus, platyomus, 

 and stenomus, but no description has ever been published. 

 Finally, Trachodon cantabrigiensis has been established by 

 the present writer 6 on a tooth from the Cambridge Greensand 

 in the British Museum. This tooth indicates a small dinosaur 

 of the iguanodon group, with a pavement-like dentition re- 

 sembling in general characters the American Cretaceous Tra- 

 chodon, but perhaps generically distinct. 



Crocodilian vertebrae in the Sedgwick Museum from 

 the formation under consideration have been described by 

 Prof. Seeley 7 as Crocodilus cantabrigiensis and C. icenicus, 

 but it may be considered certain that the generic determina- 

 tion requires revision. The head of a femur in the above- 

 mentioned collection is regarded as referable to a lizard by 

 the same writer 7 , who has proposed for it the name Patrico- 

 saurus maerocratus. 



1 Seeley, op. cit. 600. 



2 Ibid. 612. 3 Ibidf 6 2i. 



4 Ibid. xxxi. 439 (1875). 



5 "Index to Ornithosauria, etc." xvin. 



6 Cat. Foss. Eept. Brit. Mus. i. 244 (1888). 



7 Quart. Journ. Geol. Soc. xxx. 693 (1874), and xxxn. 437 (1876). 



