288 Prof. H. G. Seeley on Footprints of 



smaller animals have the digits parallel and indicate types 

 of which the skeleton is undiscovered. The footprints are in 

 relief and, owing to the nature of the sediment, are fairly 

 sharp, but the terminal extremities of the digits appear ia 

 some cases to be broken. 



The fore and hind feet of the left side of the Procolophnn type 

 of animal are shown in close sequence. The fore foot (fig. A) 

 is slightly the smaller and less perfectly preserved, and is 

 slightly obscured on the inner side by the overlap of a small 

 foot with four digits. Behind this pair of footprints the cast 

 shows a short longitudinal impression (fig. 0), which in relief is 

 concave from side to side, with a narrow median line, and 

 shows a quincuncial pattern of small pits. This marking 

 seems to indicate a fine granular ornament of the skin on the 

 under surface of the tail at a point one inch and a half behind 

 the left hind foot. As the marking extends forward on the 

 slab it becomes obscure. If it is correctly referred to the 

 tail of the same animal it shows such a mark as might be 

 made by the extremity of the tail of Procolophon, which is 

 well known. 



Ill both fore and hind feet the moderately stout digits 

 terminate bluntly without any indication of terminal claws, 

 though this may result from the condition of preservation of 

 the impression. The digits diverge on a splay-footed plan, 

 so that the first makes an angle of nearly 90° with the tifth. 

 The middle digit appears to be the longest, and the first, 

 second, and third appear to be stronger than the fourth and 

 fifth. The fifth digit of the hand is obscure. The digits are 

 more impressed than the metacarpal and metatarsal regions, 

 and there are deeper impressions on the inner than on the 

 outer side. The width of the hand did not greatly exceed 

 one inch, and it may have been an inch and a quarter long, 

 though its hinder border is not w^ell defined. 



Tiie inij)ression of the hind foot (fig. B) immediately follows 

 the fore foot. The front to back measurement over both 

 impressions is two and a half inches. The transverse width 

 between the extremities of the first and fifth digits is one and 

 a half inches; at the taisal margin the width is eight-tenths 

 of an inch. The digital impressions become narrower from 

 the first to the fiftli, which is slender and faint, so that its 

 terminal extremity is ill-defined. The third, fourth, and 

 fifth digits appear to be of equal length, but this may result 

 from the extremity of the third being lost. 



1 he comparatively short metatarsal area is defined by a 

 series of fleshy convexities in the lines of the several bones, 

 with shallow grooves between them. The first metatarsal 



