384 



W. SHONE ON THE GLACIAL DEPOSITS OE WEST CHESHIEE. 





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obtained 57 species and varieties of 

 Mollusca, 2 Polyzoa, 26 Ostracoda, 2 

 Cirripedia, 2 Annelides, 3 Echini, 2 

 Sponges, and 55 Poraminifera. 



The Microzoa were obtained from 

 the sand within the Gastropoda found 

 in the Clay, principally Turritellce, 

 upwards of 1500 of which shells I 

 washed the sand out of, and examined 

 for this purpose. 



The Middle Sands were well ex- 

 posed in that part of the section com- 

 mencing from the Trafford-road bridge 

 before mentioned, and continued on 

 the north side of the cutting for the 

 third of a mile, and gradually disap- 

 pearing beneath the Upper Boulder- 

 clajr ; the junction between the Clay 

 and the Sand was sharp and eroded. 

 The sand was very fine throughout, 

 and contained no shell-fragments, 

 except such as were of the size and 

 roundness of the grains of sand. I 

 examined it repeatedly for micro- 

 scopic shells, but it yielded none. 

 The shells in the Middle Sands are 

 usually found in the seams of fine 

 shingle which are generally present ; 

 in this case, however, though the ex- 

 posure of the sand was a third of a 

 mile in length, and of an average depth 

 of 25 feet, the sand was uniformly 

 fine throughout. It is again exposed, 

 however, in a sand-pit at Upton, be- 

 longing to Sir Philip Grey-Egerton, 

 Bart., E.P.S., a village about a mile and 

 a half north-west of the section. Erom 

 the Upton sand-pit, Mr. George W. 

 Shrubsole, E.G.S., and myself have, 

 after several years' diligent search, 

 made a small collection of shells, the 

 abundant forms being Gardium edule, 

 C. echinatum, Tellina balthica, and 

 Turritella terebra. The shells at the 

 Upton pit only occurred in one seam 

 of small shingle a few yards long 

 and about 18 inches deep. The late 

 Miss Eliza Potts, of Chester, first 

 observed this fossiliferous seam many 

 years ago • it was, however, forgotten, 



