W. SHONE ON THE GLACIAL DEPOSITS OF WEST CHESHIRE. 395 



The Mollusca from Dawpool were found by D. Mackintosh, Esq., 

 E.G.S., and myself. 



For the list of Mollusca from Lilleshall, Salop, by C. J. Woodward, 

 Esq., see Brit. Assoc. Beport, 1865 : see also George Maw, Esq., 

 E.L.S., E.G.S., " On the Drift of the Severn Valley," Quart. Journ. 

 Geol. Soc. vol. ii. p. 130 ; and for the Warrington list, Mr. Paterson, 

 Proc. Warriugton Lit. & Phil. Soc. 



Mr. De Ranee has classed all Mr. Eeade's Liverpool localities as 

 Lower Boulder- clay. I have not presumed to alter this ; but as 

 Mr. Eeade, in his list (Quart. Journ. Geol. Soc. vol. xxx. p. 27), has 

 distinguished the shells from the Upper and Lower Boulder-clays of 

 Liverpool, I have marked them U for Upper and L for Lower 

 Boulder- clay, as they are stated by Mr. Eeade to occur. 



Prof. Hughes has found the following Mollusca in the Upper 

 Boulder-clay of Denbighshire (Brynclwy — The Mount, St. Asaph) : — 



Turritella terebra. 

 Littorina litorea. 

 Dentalium striolatum. 

 Pleurotoma turricula. 

 Tellina Balthica. 



Cardium echinatum. 



edule. 



Venus exoleta. 

 Astarte borealis. 



Mr. J. E. Bateman, E.E.S., found some Mollusca in Boulder-clay 

 on the site of the Manchester Waterworks, Hollingsworth Eeservoir, 

 Mottram in Longdendale, Cheshire, 568 feet above the sea. Mr. 

 Binney, E.E.S., states that the following were the species found : — 

 Turritella terebra, Trophon clathratus var. truncata, Purpura lapillus, 

 Tellina, 2 sp., Cardium edule, and Cyprina islandica. 



Discussion. 



Dr. Gwtn Jeffreys remarked on the interest attaching to the 

 collections made by Mr. Shone, the most important series of such 

 fossils that had been brought together since Mr. Trimmer and Mr. 

 Darbishire worked out the deposits at Moel Tryfaen and Macclesfield. 

 The mixture of the northern and southern species was very notice- 

 able, and would seem to indicate that some of the beds were re- 

 manies. Venus chione and Area lactea are peculiarly southern forms, 

 and yet they occur with others which are found only in so-called 

 glacial deposits. Of the latter those found in Cheshire are of Scan- 

 dinavian and not truly Arctic type. On the other hand the fossils 

 from most of the Scandinavian Posttertiary beds are peculiarly Arctic 

 species, but do not occur in these West- Anglian beds. 



Prof. Eamsat, referring to the section, said that he could not help 

 feeling that these deposits only mark minor phases in a great Glacial 

 epoch. It seemed to him that the presence of shells in the Boulder- 

 clays was strongly opposed to the hypothesis according to which 

 these clays represented a deep moraine, and in favour of the marine 

 origin of the deposits. He asked the author whether he believed 

 that, before the deposition of the beds described, the region had un- 



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