FAUNA LOWER KEUPEll SANDSTONE. 7 



the Labyrinthodontia have been thoroughly worked out, 

 and our faith in the Labyrinthodont origin of the foot- 

 print is somewhat shaken. The footprints were originally 

 attributed to an unknown animal designated the Cheiro- 

 therium. At the suggestion of the late Mr. Gr. H. Morton, 

 F.Gr.S., the specific designation storetonense was added 

 to distinguish the more common Storeton form. 



This footprint, as found at Storeton, has roughly the 

 form of the human hand, and varies in length from 5| 

 inches to 9 inches. The smaller ones are as a rule very 

 much alike, but the largest ones, which, however, are not 

 at all common, have more fleshy digits, with the nail not 

 so distinctly shown. There are 5 digits of about the same 

 proportions as those of the human hand : four slightly 

 divergent ; one — an outer one, greatly resembling the 

 human thumb — is more divergent, curved laterally and 

 posteriorly, but there is every reason to believe that it is 

 the fifth digit. 



The integument of the sole of the hind foot is divided 

 by constrictions into divisions forming pads, which may 

 perhaps be considered to indicate the joints and phalanges 

 of the digits, and all the digits are terminated by sharp, 

 strong claws. Owing to the imperfections of all the im- 

 pressions, it is not an easy task to determine the actual 

 number of phalanges on each digit. 



The result of my examination of a great number of 

 prints is in favour of 3 phalanges each to the three inner 

 digits and 2 for the two outer, but as there is scarcely ever 

 any marked constriction on the curved digit, the number of 

 its phalanges is doubtful. 



At the base of each digit is another pad of the same 

 character as those just described. They appear to cover 

 the distal extremities of the metatarsals, the only portion 

 of the metatarsals reaching the ground. There is a 



