102 Canadian Record of Science. 



the fore foot. But another character of greater import- 

 ance appears in the footprints of this species, there is 

 a series of tracks of this species, showing eight foot- 

 marks, but of these only one is that of the three-toed 

 foot ; from this one might suppose that the common gait 

 of this animal was bipedal, and that it only occasionally 

 touched the fore foot to the ground. If this was its usual 

 method of progression, it would explain the larger size of 

 the hind foot, and the way in which the toes are spread 

 out. 



There is a third species, which I refer provisionally to 

 this genus, Sir Wm. Dawson's Hyloptis (?) caudifer. Here 

 the disparity in size between the three-toed foot and the 

 other is greater even than in the species last described, 

 and the former has a lighter or shorter heel than the 

 three-toed foot of the other two species. In this species 

 also we note the infrecjuency with which the impression 

 of the three-toed foot is found : on a slab showing eight 

 footprints of a consecutive series, only one is that of the 

 fore or three-toed foot. 



As in the preceding species, one might infer that the 

 animal was a biped. To this view, however, there is an 

 objection, which arises from the presence of a groove 

 which appears to represent the trailing of the belly or 

 tail along the surface of the sand. If this animal were 

 bipedal in its movement, it would not be unreasonable to 

 suppose that this " tail " mark would sway from side to 

 side : on the contrary, it continues strictly medial as far 

 as it is impressed on the sand : a narrower median groove 

 in the same track, however, is not strictly central. 



In regard to the two last species, the evidence appears 

 to indicate that the three-toed foot is the fore foot. 



Cuksipes n. gen. 



A series of footmarks, small and well preserved, appears 

 to indicate another, but related genus. It is a light foot- 

 print, with long slender toes resembling Batrachites of 



