﻿304 . Clement Reid — Pliocene Beds near Cromer. 



Pupa, sp. 



Carychium minimum. 

 Clausilia, sp. 

 Corbicula Jluminalis. 

 Sphcerium corneum. 



Pisidium amnicum. 



fontinale, var. Eenslowana. 



■ pusillum. 



Unio pictorum. 

 yinodon cygneus. 



To the above list may be aclded Physa fontinalis and Planorhis 

 nitidus from specimens in the Norwich Museum. I have been 

 unable to find Unio margaritiferiis and Pisidium nitidum mentioned 

 in Prof. Prestwich's paper (op. cit.). 



None of the shells are stunted, and the whole assemblage, with 

 the exception of Corbicula fluminalis, is such as might now be found 

 in the Norfolk broads. There appears to be no sufficient reason 

 for classing eitlier this or the Weybourn Beds with the glacial 

 series, for the climate, as shown by the land animals and plants, 

 was but little, if at all, colder than at present. The first appear- 

 ance of Tellina BaltMca, so much relied upon by Messrs. Wood 

 and Harmer, seems liardly of sufficient importance, in the absence 

 of other evidence, to mark the incoming of the Glacial Period, for 

 it is now living on our coasts, and is by no means a peculiarly arctic 

 shell. 



Myalis Bed. 



We now arrive at beds which show a decided change of con- 

 ditions, for directly over the fresh- water deposits and usually 

 separated from them by a marked line, occur fine false-bedded 

 sands with gravel and loam, the fossils of which would have lived 

 in a depth of five or ten fathoms. These sands, for which I propose 

 the name of Myalis Ped, from their being characterized by the 

 presence of Leda myalis, are very sparingly fossiliferous ; but where 

 fossils do occur, they form colonies, with the bivalves in their natural 

 position. I have been unable to adopt Prof. Prestwich's name of 

 " Westleton Beds," as the shingle at his tyjDical locality is unfossil- 

 iferous, isolated, and is not seen in connexion with either the Fresh- 

 water Bed or the Contorted Drift. His fossils were obtained from 

 the Weybourn and Fresh-water beds, with the exception of Leda 

 myalis and Mya trimcata, obtained from West Eunton.^ 



This bed has already yielded the following species, and I hope 

 in time to add more : — 



Cardium edule, r. 

 Cyprina Islandica, v.c. 

 Leda myalis, v.c. 

 3Iya truncata, v.c. 

 Ilytilus edulis, r. 

 Ostrea edulis, v.c. 

 Tellina BaltMca, c. 



Buceinum undatum, r. 

 Lacuna, sp., v.c. 

 Littoriiia littorea, c. 



„ rudis, v.r. 

 Natica, sp., v.r. 

 Purpura lapillus, r. 

 Trophon antiquus (reversed var.), r. 

 * Astarte borealis, r. 



* In their natural position -with the valves united. 



A careful examination of the junction of the Myalis Be'd with the 



1 "When on a visit to Westleton last year, my colleagues, Messrs. H. B. Woodward 

 and J. H. Blake, ascertained that the shingle at that locality was the equivalent 

 of masses of shingle that occur in the so-called Middle Glacial Sands of Dunwich 

 Cliff. 



