14 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



any individual set of feet, thus presenting a marked contrast 

 to the stately march of our unknown friend the Cheiro- 

 therium. Although we have a pretty clear idea of the 

 footprint of the Rhynchosaurus. a number of the prints 

 merely attributed to it from their size and lizard-like 

 appearance, probably were made by other animals. 

 Although undoubtedly it was a tailed animal, we have no 

 distinct traces of the tail of the Rhynchosaurus. 



Another member of the family whose remains are 

 perhaps more generally distributed in Great Britain is 

 Hyperodapedon. Fairly perfect remains have been found 

 at Elgin, and more fragmentary at Warwick and South 

 Devon. We are indebted to Professor Huxley for a full 

 description and figures (Q.J.GLS., vol. 43, p. 675, 1887). 

 Through the kindness of Professor Herdman I have here a 

 cast of the skull, which will give some idea of the struc- 

 ture of the skulls of the Rhynchosauridse. Hypero- 

 dapedon was somewhat similar to Rhynchosaurus, but 

 instead of two rows of teeth it had several, the roof of the 

 mouth being nearly covered. It was a much larger 

 animal, being six or seven feet long, and in many respects 

 was more specialised. 



Unfortunately we have no remains of the posterior 

 extremity, but the whole of the fore limb we have fairly 

 perfect. The manus seems to have been rather smaller 

 in proportion to the size of the body with rather stouter 

 digits, and was probably more expanded than that of the 

 Rhynchosaurus. 



Judging from its somewhat wide distribution, we 

 have some grounds for expecting its presence here, but its 

 footprints have not been identified. 



The Telerpeton, another allied genus, was much 

 smaller, not exceeding a foot in length, and resembles the 

 true lizards more nearly than the forms just described. 



