INVESTIGATION OF FAUNA AND FLORA OF TRIAS OF BRITISH ISLES. 229 



parently caused by a tail. This is almost certainly the slab described by 

 Mr. Cunningham ^ as having been found at Flaybrick Hill, Birkenhead 

 (it is labelled ' Probably Runcorn ' at present). There are 



two prints of the right foot and three of left, 6 inches sepa- b ''. 4- Left 



rating the right line from the left ; length of stride from Pes, 



one print to the next of the same foot is 1 5 inches. The 



prints are Ih inch long, and are rather more slender than 



B 1 ; both the first and fifth digits diverge considerably 



from the others ; there is no curvature discernible on the 



fifth ; the pes appears to have been placed upon the print 



of the manus, obliterating it and confusing both ; but one 



of the prints is fairly clear and was figured. Other imperfect prints 



probably representing this have been seen, but at present we have no 



knowledge of the manus. This form will be described as B 2.- 



L. — One other form must be included in this group. It is a small form 

 about 4 inches in length, and resembles Cheirotherium in every respect 

 except that it presents only four digits. Three are long, 

 straight, and nearly parallel, the middle one the longest, -'■-'■ '^Tr^^^*' '^^^ 

 and all terminating in long claws, and a fifth, somewhat ^° " ' 

 curved, occupying nearly the same position as the fifth in 

 A ; but it is rather further back and slightly nearer the 1""'^^ 



middle line of the foot. 



The pads at the base of the digits are well marked. 

 The digits represented are probably 2, 3, 4, and 5. The 

 curve on the fifth digit is almost entirely confined to the 

 bending of the last joint. The most perfect specimen seen 

 is from Guyscliff*, Warwick, now in the Bootle Museum. 

 In it there is a very clearly defined margin on the inner 

 side of the print extending from the tip of the second digit 

 to the posterior margin of the pad, with no trace of a 

 first digit reaching the ground. The same form has been 

 found at Storeton lately, and there is in the British Museum a long slab 

 of Cheirotherium prints (R. 729) on which a series of these prints cross 

 the others obliquely. In these the prints of the manus (not shown on 

 the other examples) is seen. It consists of three short stout digits, and 

 is three-quarters of an inch in length and about the same in breadth. 

 (Plate VII.) 



This form has been described under the letter L.^ 



This print seems to agree in some respects with the description given 

 of Cheirotherium minus (Sickler) in Lydekker's ' Catalogue of Fossil 

 Reptilia and Amphibia in the British Museum,' vol. iv. p. 217, which is 

 apparently taken from Sickler, but it does not agree with that figured by 

 Winkler (see anf.e).'^ 



The foregoing have all been seen to have a form resembling the 

 Cheirotherium print and readily take their places in this group ; and 



' Proc. Liverpool Lit. and Phil. Sue, vol. i. (figure). 



" In the Musee Teyler, Harlem, there is a print described and figured by Winkler 

 as Cheir other i] on. minor. M. Sickler (^Archives, vol. ii. p. 430, pi. 3, fig. 2). He 

 suggests it may be the print of a j'oung animal, but the figure does not agree with 

 the prints discussed above. 



' Proc. Liverpool Gcol. Soc, vol. ix. p. 289, pi. 15. 



* See also Buckland's Bridgwater Treatise, 1st edit., vol. i. p. 265, and vol. ii. 

 pi, 26. 



