[MATTHEW] NEW GENUS OF BATRACHIAN FOOTPRINTS 91 



smooth impression, but this seems scarcely of sufficient force to hokl it 

 in the genus Hylopus. The roughness which is coimmoii cliaractor in 

 Asperipes may in some cases be due to the print of the fore foot falling 

 in the print of hind, and obscuring it. 



This species is distinguished from the two preceding by the pro- 

 portionately small size of the fore foot. 



Batrachichnus, Woodworth. 



Among the three species of footprints of Carboniferous age from 

 the Joggins described by the a,uthor last year ^ was one which from the 

 number of toe prints and the slenderness of the toe were referred to 

 Dromopus, Marsh. A knowledge of additional forms related to this 

 species leads the author to think a reference to Woodworth's genus 

 Batrachichnus, more appropriate. The type of this genus, B. plain- 

 villensis, and these forms are small, with slender toes arranged in radiate 

 manner, and made by animals that may have much resemblance to each 

 other, but none of them have the strong median groove of Woodworth's 

 species. If, however, we disregard this marking as not being of generic 

 importance Dromopus celer may well be placed provisionally in this 

 genus Batrachichnus until the value of the median groove as a generic 

 distinction can be more clearly established. 



Dromopus celer, the species from the Joggins above referred to, 

 may well be placed in the genus Batrachichnus, but the following 

 species is distinct by the number of it? toe prints, thcugh near B. celer 

 in its size and general form; on account of the difference in the num- 

 ber of toes shown in the footprint it is placed in a separate genus. . 



Dromillopus n. gen. PI. 1, fig. 5. 



Small digitigrade batrachians. Toes slender, directed forward in a 

 radial manner; imprint showing only four toes to each foot. 



Dromillopus quadrifidus, n. sp. PI. I. fig 5. 



Stride, 26 mm. Straddle, 18 mm. The fore foot in the series of 

 footmarks is placed behind the hind foot, and usually a little inside 

 of it. 



Hind foot. Length, 9 mm. Width, 8 mm. Four toes are im- 

 pressed, of which the outer one sets off somewhat from the other three; 

 these are long and slender, the third somewhat longer than the second, 



» Brith. Nat. Hist. Soc. N.B., Vol. V., p. 103. 



