94 ROYAL SOCIETY OF CANADA 



Hind foot. Length, 13 mm. ; width, 13 mm. There are four toes 

 which axe widespread, covering more than a quadrant. The fifth digit 

 is set off somewhat from the others, which are spread at an angle of 

 70° or 80°; the fourth digit is considerably longer than the others; 

 the second digit is short ; these, and the third -have no claws ; the first 

 digit is wanting. J^o sole to the foot is traceable Angle of incidence 

 of the digit II-V=100° (to 110°); IV-Y (30° ? to) 55°. 



Fore foot. Only the tips of the toes appear; these are three in 

 number, and somewhat regularly placed, having the outer longer and the 

 inner somewhat shorter than the middle one. The sharp indentation 

 would seem to indicate that there were claws on these toes. 



The very light impression of the toes of the fore foot would seem 

 to indicate that the animal could walk on its hind feet. The absence 

 of a sole to the foot would indicate that the animal walked, bearing the 

 weight of the body on the hind feet or that it was partly water-borne. 



This species is distinguished from C. Dawsoni by the narrow 

 straddle, which is only half that of C. Dawsoni; also by the print of the 

 fore foot being somewhat outside that of the hind foot; also by the 

 very light print of the fore foot. 



Barillopus.^ 



Under the genus Baropus, Marsh, the writer last year, described 

 a neat little footmark from the Joggins shore, which, on further con- 

 sideration, he thinks should be separated as the type of a new genus. 



It is much smaller than Marsh's type of Baropus, and has a broad 

 and rounded sole to the hind foot, while that of _^Baropus projects back- 

 ward in a heel. The parallel grouping of the three inner toes, separate 

 from the outer one, is also a distinctive character. 



AH the species were small, short legged, low-bodied animals, appar- 

 ently of sluggish habit. 



Barillopus unguifer, Matt. (PL, Figs, oa and 5&) is the type. 

 There are two other species from the Joggins. 



The name is a diminutive of Baropus==heavyfoot. 



In Barillopus these seems less reason to question the relation of 

 the two kinds of footmarks than in the two genera first described, because 

 one is not only larger than the other, but the constant forward direction 

 of most of the toes in this footmark would indicate a hind foot. If 

 one examines the footprint left by a frog or an alligator, he will be 

 struck by the radiate arrangement of the toes of the fore foot as com- 

 pared with those of the hind; hence it seems quite in accord with the 

 ordinary attitude of the toes in the Crocodilia and the tailless amphibians 



' Can. Rec. Sci.. Vol. IX., No. 2, p. 103, Montreal, 1903. 



