60 Vertebrate Palaeontology of Cambridgeshire 



Owen's 0. daviesi, from the Folkestone Gault, appears to be 

 closely allied, if not identical. The other Cambridge Green- 

 sand forms, of which the bare enumeration must suffice, in- 

 clude 0. brachyrhinus, 0. capita, 0. colorhinus, 0. crassidens, 

 0. enckorhynchus, 0. eurygnathus, 0. huxleyi, 0. machaero- 

 rhynchus, 0. microdon, 0. nasutus, 0. oureni, 0. oxyrhinus y 

 0. platysomus, 0. polyodon, 0. reedi, 0. scaphorhynchus, 

 0. tenuirostris, and 0. xiphorhynchus, as well as a few more 

 which have received names but have not been described. 



Remains of dinosaurs, or giant land reptiles, are compara- 

 tively rare in the Cambridge Greensand, and those that have 

 been found, although in some cases comprising a considerable 

 number of associated bones, are so battered and imperfect 

 that the determination of their true affinities is often im- 

 possible. Only two dinosaurian teeth have been recovered 

 from the formation, of which one is noticed below, while the 

 other appears to be lost. Nearly all the Cambridge forms 

 seem to have been of medium size. Some of these dinosaurian 

 remains have been described at considerable length by Prof. 

 H. G. Seeley 1 , but of others there is little or nothing in the 

 way of description. Under these circumstances it seems 

 preferable to refer in most cases to the different genera alpha- 

 betically rather than attempt to arrange them systematically. 



In 1867, Prof. Huxley described from the Chalk- Marl of 

 Folkestone certain dinosaurian teeth and bones, under the new 

 name of Acanthopholis horrida. They indicate a member of 

 the armour-clad group belonging to the family Sc('li<loMntrid(jM. 

 To the typical Folkestone species certain vertebrae from the 

 Cambridge Greensand have been assigned by Prof. Seeley, who 

 also recognizes a second species from that formation, under the 

 name of A. eucercus, other vertebrae and a foot-bone being 

 respectively made the types of species as A . stereocercus and 

 A. platypus. Possibly, however, the last may be inseparable 

 from the undermentioned Macrurosaurus. As to Anoplo- 



1 Quart. Journ. Geol. Soc. xxxv. 591 (1879). 



