THE CARRONIFEROUS. G3 



Canada, and which has been described by Mr Sclwyn and myself.* 

 The dimensions of the footprints are — 



Hind foot, breadth 



„ „ length 



Fore foot, breadth 



„ „ length 



Length of stride 



Average distance between the rows of foot- 

 prints made by right and left feet . 5-48 „ 



These measurements correspond very nearly with those of my 

 Sauropus Sydnensis.-^ 



The hind foot, it will be observed, is considerably longer than the 

 fore foot, and has a sort of plantigrade appearance ; and there are 

 some indications which show that the legs must have been strong and 

 thick. 



The hind foot shows four well-developed toes, the three outer 

 stronger than the remaining one. There was also a fifth toe, which 

 must have been placed at a higher level than the others, on the out- 

 side of the foot. It bore a long claw, which was plunged into the 

 mud at each step, and when the foot was raised made a curved trace 

 on the surface. It probably corresponded to the thumb-like fifth toe 

 of labyrinthodon, and to the detached outer toe of the foot-prints 

 figured by Sir C. Lyell. The fore foot is as broad as the hind foot, 

 but much shorter, and shows four strongly-marked toes, with more 

 obscure impressions of a fifth. 



All the toes of both feet are broad in front, and seem to have had 

 claws, but not of great length, except in the case of the detached toe 

 of the hind foot above referred to. There is no indication of a mem- 

 brane connecting the toes. 



The prints of the hind and fore feet of each side are in a line, and 

 the distance between the right and left lines, say 5| inches, indicates 

 a body broad in comparison with the length of the legs. 



The impression of the hind foot is either a little way behind that 

 of the fore foot, or the impressions are equidistant, indicating a 

 walking gait varying somewhat in the length of the stride. 



There are no indications of a tail, and in general the body was 

 carried clear of the ground ; but in one place it has been dragged along 

 the surface, leaving longitudinal furrows, probably indicating that 

 the abdomen was clothed with bony scales, as was generally the case 



* Cieol. Magazine, vol. ix. f Acadian Geology, p. 358. 



