228 REPORT— 1903. 



fifth digit it seetos we are justified in considering the difference as struc- 

 tural. 



The three forms described may be provisionally grouped utidet* 

 letter A : — 



A 1. Cheirotheriiim stortonense. 



A 2. The Lymm form. 



A 3. Cheirotherium llerculis. 



K. — The next form to be considered is one that would seem at first 

 sight to be altogether dissimilar to the foregoing, but is possibly very 



intimately connected with them : it is a short 

 K. l- — Left Pes. round print, rather broader than long, and mea- 



sures about 5 inches across. It shows four toes, 

 greatly resembling the first four of A 2, and, like 

 them wide at the base and tapering rapidly to a 

 point without trace of pads, except at the base, 

 and presenting the longitudinally ridged appear- 

 ance described. The other digits are somewhat 

 curved laterally, and a similar curvature is obser- 

 vable in the Cheirofherium llerculis. 



It has been found at Storeton, but is more 

 common in the Lymm district. There are two examples from Lymm in 

 the Grosvenor Museum, Cheshire. 



This corresponds, in fact, somewhat to the distal portion of A 2, the 

 fifth digit not having appai-ently reached the ground, or at any rate not 

 having left an impression. However, as there is no sign of its being a 

 merely imperfect pi-int, it has been described separately as K.^ 



B 1 is a suaall form described and figured by Mr. G. H. Morton - 

 from a specimen in the Liverpool Free Museum from Storeton. It 

 consists of four stout rapidly tapering digits, slightly diver- 

 1^1- G- — Left gent, and a fifth short and broad standing outwards at a 

 considerable angle. The points of difference between A 1 

 and A 2 are greatly accentuated, the breadth of the digits 

 being much greater and the length less in proportion to the 

 size of the print. Mr. Morton has named this C/teiro<Aert«?u 

 ^— ^ minus. It is doubtful whether it is the same as the print 

 ^ to which Sickler gave that name in 183-5 ; but no oppor- 



tunity has occurred for comparison. The small print in the 

 British Museum, R. 419, supposed by Lydekker^ to represent this, is 

 rather obscure, but seems to difier from the Liverpool print. The length 

 of the print is nearly 3 inches, but the Avriter has one about half 

 the size — also from Storeton — in which the peculiar features of the print 

 are more strongly marked. This may possibly point to the prints being 

 made by an immature animal, as suggested on the original label in the 

 Liverpool Museum. This print will be referred to as B 1. 



B 2. There is some resemblance between the form just described and 

 the prints on a slab in the Bootle Museum (No. 5) showing a series of 

 five prints, with a slightly sinuous furrow following the middle line, ap- 



' 'On two Footprints from the Lower Keuper audtlieir Relation to Chcirotlierium 

 Stortoneuse,' Proc. Liverjjuol (reuL Soc, vol. ix. p. 238, pi. 15. 

 - Geoloijy of the Cowntrt/ arovncl Liverpool, Append., p. 2.^9. 

 ' Catati-KjiK- of Fossil Ii'cpti'ia itt British 2Itucuin, \ol. iv. p. 217. 



