84 PEOCEEDINGS OF THE GEOLOGICAL SOCIETY. [DoC. 19, 



character by which it differs from existing Lacertilia is the 

 structure of the fifth digit of the hind foot, in which, however, it 

 departs from all known Lacertilian reptiles, whether recent or 

 fossil. 



It is most interesting to observe that Telerpeton presents not a 

 single character approximating it towards the type of the Permian 

 Protosaiiria, nor to the Triassic Rhyncliosaurus and other (probably 

 Triassic) African and Asiatic allies of that genus*, nor to the 

 Mesozoic Dinosauria; stiU less can it be considered a "gene- 

 ralized" form, or as, in any sense, a less perfectly organized crea- 

 ture than the Gecko, whose swift and noiseless run over walls and 

 ceilings surprises the modern traveller in warmer climates than our 

 ownf. And whether the age of the deposit in which it occurs be 

 Triassic or Devonian, Telerpeton is one of the most astonishing 

 examples within my knowledge of a persistent type of animal or- 

 ganization. 



2. On a SECTioif at Litcham affording evidence of Land-Glaciation 

 during the earlier part of the Glacial Period in England. By 

 S. Y. Wood, Jun., Esq., E.G.S. 



The structure of the Lower Drift, and the limited area to which 

 it is confined, conspire to show that this country first encountered, 

 and for a long period sustained, the glacial conditions while prin- 

 cipally in the state of land; for not only do the limited super- 

 ficial extent of the formation and its rapid attenuation in all di- 

 rections, from its great development on the Cromer coast, necessi- 

 tate an inference that only a small part of England was under 

 water at the time of the deposition of the Lower Drift, but the great 

 masses of chalk and chalky debris that were carried into the marine 

 sediment require us to admit the presence, near at hand, of some 

 terrestrial chalk-area from which these masses were detached ; and I 

 imagine that it does not require any illustration here to satisfy 

 geologists of the fact, so obvious from the appearance of the Cromer 

 Cliffs, that much of the chalk of Norfolk was, at the time these 

 masses were imbedded, occupied by a great glacier, from whose sea- 

 ward termination they were carried and dropped into the marine 

 sediment. 



In such a state of things we should naturally look for some 

 evidences inland of the terrestrial glaciation which this structure 

 involves. 



The beds in section on the Cromer Coast, forming the Lower 

 Drift, although of so great a thickness there, alter, as I have else- 

 where shown, both in their appearance and thickness inland. 



* The anterior tusk -like teeth are comparable to the anterior teeth of UTiyn- 

 chosaurns and Dicynodon, only so far as these are comparable to the like teeth 

 of many existing Lizards, e. g. Uromdstrix and Hatteria. 



t Dr. Mantell suggested that, should the lacertian relations of Telerpeton 

 be established, it probably differed but little in its physiognomy and economy 

 from the small existing terrestrial Lizards. 



