BIBLIOGRAniY. I9I 



Transactions of the Hull Scientific and Field Naturalists' Club. 



" The Published Records of the Land and P'reshwater Mollusca of the East 

 Riding, with Additions," by T. Petch [several spp. recorded additional to last 

 " Census."'] 



"Beitrage zur Kenntnis der Mollusken-Fauna der Magalhaen-Provinz, 

 II., Die Trochiden," by Hermann Stricbel {Zool. /ahrbiicher, Syst., Suppl. 

 S, p. 121-166, pi. 5 [an elaborate discussion of the forms discovered, 5 nn.spp.]. 



" A.lcuni nuovi fossili sinemurani, " by R. Bellini [several new forms described], 



"L'EIveziano nelle colline di Chivasso presso Torino," by Raffello 



Bellini [list of fossil shells, some still living in the Mediterranean]. 



Nature Study, vol. 13, no. 148, October, 1904. 



" Molluscs in South Yorkshire " [few spp. from Shipley Glen]. 



Freshwater Shells in Masses in Shell-Marl.— I have read with interest 

 Messrs. Dean and Jackson's account of the Hawes Water shell-marl {antea, p. 

 147) as we have so many deposits of this nature in Ireland, usually under peat bogs. 

 There are, however, lakes in Ireland such as Lough Talt, Co. Sligo, where masses 

 of a Chara and a shell-marl form the bottom deposits. At Lough Talt this is dredged 

 up by the farmers to "lime" boggy land with. This particular deposit is very 

 friable, unlike some of the very compact shell-marls of Co. Fermanagh, which are, 

 in some cases, now under tillage, the overlying bog having been cut away. Some 

 of these Irish deposits have much larger quantities of shells in them than others, the 

 species pretty much as given for that at Hawes water. Little "pockets" or masses 

 of shells occur, and the way in which these may collect can be observed on the 

 shores of many lakes, especially on those along the western border of the central 

 limestone plain of Ireland. In Scarriff Bay, Lough Derg, masses of dead shells, 

 very largely composed of Bithynia may be found, rapidly undergoing a sort of con- 

 solidation, indeed, the first stages of fossilization ; the decaying Chara stems and 

 lime deposited in hot weather as the mass dries, compacting the whole pretty firmly 

 together. Large areas of marl, I am told, occur along portions of Lough Cara 

 shores, Co. Mayo, exposed many years ago by drainage operations which lowered 

 the level of the lake. As I hope to visit this deposit this season I will not do more 

 than mention it now. While visiting Portmore Lake, Co. Antrim, some years ago 

 with Mr. R. LI. Praeger I found masses of Bithynia stranded on one part of the 

 shores. A small proportion of Valvata piscinalis was with them. Afterwards Mr. 

 Praeger came across a shell strand at Menlo on Lough Carrib composed of many 

 species. The Portmore shells were almost all adult, a few, though empty, still had 

 the operculum on the shell. This was at the end of May and as I have found 

 similar masses in early June on shores of Lough Neagh and some Fermanagh lakes 

 I take it these are the adults dying off just as Liiniiiva ptreger and some other fresh- 

 water species do at this season. In the spring of 1897 great quantities of very young 

 A/wAVpa /i6'r<;j,'i'r (possibly killed by late frosts) came ashore in Lough Neagh, all 

 along the shallow rocky portion of Cranfield Point. At some points where tree 

 roots had stopped the drift the mass was fully ten inches deep. This also contained 

 many juvenile Physa fontinalis and some Pisidia. A little to the north of this large 

 quantities of drift shells collect in some winters in the little bays; a bagful has 

 yielded ten freshwater and about four or five land species. — R. Wklch {Kead 

 before the Society, January nth, 1905). 



