I^O JOURNAL OP CONCHOLOGY, VOL. II, NO. S, JANUARY, I905. 



if any of our members could help us in this respect, as our own 

 efforts have failed to glean any information concerning him. 



The matter having been thus neglected we devoted much of our 

 time and energy to it, and trust that the results so far obtained will 

 be not unworthy of the attention of our fellow-workers. 



For the purpose of ready reference, we have arranged the species 

 found in the deposit, along with those now living in the neighbour- 

 hood, in a table which will be found at the end of the paper. In this 

 table we have queried several of the shells in the column marked 

 " In deposit," owing to the fact that they were found amongst the 

 debris on the shell-beach and not in the actual deposit. Although 

 having a bleached semi-fossil appearance, we thought it better to do 

 this, in order not to lead to any misconception. 



Three of them — Pisidiu?n pulchellum, Spharium corneum, and 

 Planorbis fontaniis — we have not yet found living in the tarn or its 

 immediate neighbourhood, but the last occurs plentifully in Bank 

 Well, not far from Silverdale station. 



A similar deposit evidently occurs in Crummockdale, near Clapham, 

 and is referred to by Mr. Hugh Richardson, in his paper on the 

 mollusca of the neighbourhood of Clapham, Yorkshire,^ wherein he 

 mentions the following species from "lake-marl": — 

 SphcBriuni coriieiun (L)., 



Pisidiuvi 



Planofhis niiidus (MiilL), 

 Limjicea peregra (Miill)., 

 Z. palustris (Miill.). 



Valvata piscina lis (Miill.), 

 V. cristata Miill, 



He also states that there is little or no peat above it. . 



Mr. R. Welch informs us that he has worked similar deposits in 

 Ireland, and through his kindness we have been able to examine and 

 compare specimens of the marl from such places as Carra, Co Mayo; 

 and Kilnamadoo, Enniskillen. These, however, are more compact 

 and bear every appearance of having been subjected to more pressure. 



As mentioned by Dyson, there is a more extensive deposit on the 

 Burton and Yealand Mosses, but we have not yet investigated it 

 sufficiently to say much about it. We have casually examined a 

 portion known as Hale Moss, where we found several species of land 

 and freshwater shells in a semi-fossil condition. These were on the 

 surface of what appeared to be a dried-up morass, the place appear- 

 ing quite white as seen from the road. The following are the species 

 obtained : — Li?nncEa pereger, Bithynia tentaculata^ Hygromia hispida, 

 Hy. rnfesce?is, and Succi?iea elegans. 



The last species possesses a remarkably thick shell, and also occurs 

 living in the small tufts of grass growing on the deposit. Judging 

 from the living shells, they are all referable to the van ochracea, but at 

 first sight they strongly resemble S. oblonga. 



I /. of Conch., vol. s, p. 60, 1886. 



