HT^NODONTIDJE. 39 



that species varied greatly in size), 'and more nearly corre- 

 sponds to H. vulpinus. It probably belongs to the same 

 species as a femur from the same locality noticed below, 

 and would seem to indicate a second British species of 

 Hycenodon, since no small forms of Pterodon are known. 

 Hastings Collection. Purchased, 1855. 



28155. The left radius of a large species, imperfect distally; from 

 ~ the Upper Eocene of Vaucluse. 



Bravard Collection. Purchased, 1852. 



28169. The left radius, slightly smaller than, but otherwise similar 



to, the last specimen ; from the Upper Eocene of Vaucluse. 



Bravard Collection. Purchased, 1852. 



26759. The right radius, similar in size to the last, but with a 

 squarer proximal articular surface ; from the Upper Eocene 

 of Yaucluse. Pomel Collection. Purchased, 1851. 



28239. The left radius, similar in size to the last two specimens, 

 but with the distal articular surface more elongated ; from 

 the Upper Eocene of Yaucluse. 



Bravard Collection. Purchased, 1852. 



28289. The right radius, agreeing in size and the form of the proximal 

 articular surface with No. 26759 ; from the Upper Eocene 

 of Vaucluse. Bravard Collection. Purchased, 1852. 



28210. The greater portion of the right radius of a smaller form ; 

 from the Upper Eocene of Vaucluse. 



Bravard Collection. Purchased, 1852. 



28196. Distal two thirds of the radius of a small form ; from the 

 Upper Eocene of Vaucluse. 



Bravard Collection. Purchased, 1852. 



27583. The bones of the right fore-foot of a medium-sized form ; 

 from the Upper Eocene of Vaucluse. 



Bravard Collection. Purchased, 1852. 



26751. The three inner right metacarpals of a larger form ; from 



the Upper Eocene of Vaucluse. 



Pomel Collection. Purchased, 1851. 



26752. The left scapho-lunar ; from the Upper Eocene of Vaucluse- 



Pomel Collection. Purchased, 1851. 



28193. The distal half of the femur of a large specimen, in a much- 

 crushed condition ; from the Upper Eocene of Vaucluse. 

 Bravard Collection. Purchased, 1852. 



