770 BEPORT— 1893. 



By a fortunate chance toreholes have within the last ten years heen put down 

 at each of the localities named ; the authors have had opportunities of watching 

 the progress of the work, and the investigation has yielded results entirely 

 different from those previously recorded. 



At the most easterly exposure a good brook section displays a considerable 

 thickness of the marls. The details of the well sections are as follows : — 



West Heaton Mersey Hope Hill Stockport East 



Bunter — — — 



Collyhurst marls. 143 feet 6 inches. 150 feet. 134 feet. 



The authors consider that the close correspondence in thiclmess of the upper- 

 most member of the Permian series in all three sections justifies the opinion that, 

 whatever may be the case elsewhere, there is no evidence of unconformity at 

 Stockport. The facts brought to light have an important bearing upon the 

 question of water supply, and also encourage the expectation that coal may be 

 profitably worked beneath the newer rocks at long distances from the western 

 edge of the Cheshire coalfield. 



7. Note on some Molluscan Remains lateli/ discovered in the English Keuper. 

 By R. Bdllen Newton, F.G.S., British Museum (Natural History). 



This communication directs attention to the discovery, by the Rev. P. B. Brodie 

 and Mr. E. P. Richards, of some obscure impressions of lamellibranch shells in 

 the green gritty marls of the Upper Keuper Sandstone of Shrewley, Warwickshire, 

 which form the first evidence of a molluscan fauna from these beds as developed in 

 this country. The matrix appears to be so peculiarly unfavourable for the reten- 

 tion of shell structure that it is doubtful whether any better material than the 

 present will ever be forthcoming. The specimens indicate truly marine types, 

 though on account of bad preservation only three of them could be selected for 

 description as exhibiting certain characters in their contours and sculpturing, which 

 might be of service in ascertaining their probable generic positions. Estheria 

 mmwte is the one invertebrate form hitherto recorded from the British Keuper; 

 that is, excluding the Foraminifera described by Professor T. R. Jones and AV. K. 

 Parker,* which came from an alabaster pit at Chellaston, near Derby, and which 

 were doubtfully referred by the authors to an Upper Triassic age. The very 

 modern faciesof the Foraminifera has suggested the highly probable idea that they 

 were derived from superficial deposits. 



Associated in the matrix containing these molluscan impressions are fragments 

 of cestraciont spines and teeth {Acrodus Keuperinus) and a part of a carapace of 

 the small phyllopodous crustacean, Estheria minuta. 



The specimens described are identified as — 



(1) Thrac-iaQ) Brodiei (n. sp.). 



(2) Gonwmya Keuperina (n. sp.). 



(3) Pholadomya (?) Ricliardsi (n. sp.). 



Such generic forms as are represented here have not apparently been reported 

 from rocks of a similar period on the Continent or elsewhere. 

 Fifteen specimens and a diagram accompanied the paper. 



8. Ohservations on the Skiddaw Slates of the North of the Isle of Man. By 

 Herbert Bolton, Assistant Keeper, the Manchester Museum, Owens 

 College. 



The Skiddaw slate group of the north of the Isle of Man consists of alterna- 

 tions of quartzites, schists, slates, and bedded volcanic ash, penetrated by intrusive 

 sheets and dykes and ramifying qiiartz veins. 



' 'On some Fossil Foraminifera from Chellaston, near Derby,' Quart. Journ. Gcol. 

 Soc, 1860, vol. xvi. pl^. 10, 20, pp. 4.52-458. 



