158 DIN0SAUR1A. 



anterior border, and the symphysis much produced posteriorly. 

 This genus, which is provisionally included in the family, appears to 

 connect the other members with the Cceluridce. 



Aristosuchus pusillus (Owen *). 

 Syn. Pcekilopleuron pusillus, Owen 2 . 



The type species. Approximating in size to Hypsilophodon 

 foxi. 



Hob. Europe (England). 



R. 178. Portion of the lumbo-sacral region of the vertebral column, 

 (Fig.) containing five centra with portions of their arches, and 

 the associated pubes ; from the Wealden of Brook, Isle of 

 Wight. This specimen is one of the types, and is 

 figured by Owen in his ' Wealden and Purbeck Reptilia/ 

 suppl. vii. pi. i. fig. 4, as Poikilopleuron ; noticed by 

 Marsh in the ' Amer. Journ.' ser. 3, vol. xxvii. p. 335 

 (1884), as Coelurus ; and figured by Seeley in the ' Quart. 

 Journ. Geol. Soc' vol. xliii. pi. xii. figs. 13, 14, and wood- 

 cut p. 223. Owen (with whom Hulke is inclined to agree) 

 considers that there were only two sacral vertebrae (as in 

 Creosaurus), but Seeley refers all the five vertebrae of this 

 specimen to the sacrum. 



Fox Collection. Purchased, 1882. 



E. 178 a. One lateral half of a dorsal vertebra, of which the split 



(Fig.) surface has been polished ; from Brook. Figured by 



Owen, op. cit. pi. i. fig. 3 ; and noticed by Seeley, op. cit. 



p. 27. /Same history. 



R. 178 b. Two imperfect caudal vertebrae; from Brook. Noticed 

 by Seeley, op. cit. p. 27. Same history. 



R. 179. A terminal phalangeal, probably belonging to the manus of 

 (Fig.) this form ; from Brook. Figured by Owen, op. cit. pi. i. 

 figs. 12, 13 ; also noticed by Seeley, op. cit. p. 27, who 

 suggests that it may be Ornithosaurian. It agrees so 

 closely in contour and in the deep lateral claw-groove 

 with the corresponding phalangeal of the third digit of the 



1 Wealden and Purbeck Reptilia (Mon. Pal. Soc), suppl. vii. p. 2 (1876).— 

 Volkilopleuron. 

 Loc. cit. 



