34° JOURNAL OF CONCHOLOGY, VOL. 9, NO. II, JULY, igOO. 



La Feuille des Jeunes Naturalistes, nos. 354 and 355, April and May, 1900. 



" Liste des coquilles marine, terrestres et d'eau douce, recueillies aux environs 

 de Cancale," by H Martel. 



" List of shells collected by Vernon Bailey in Heron and Eagle Lakes, 

 Minnesota, with notes " [18 spp., enumeration of forms of LtmncEa emarginata 

 Say], by R. E. C. Stearns. (Proc. U.S. Nat. Mus., vol. 22, no. 1190, p. 

 135-138). 



" Description of a new variety of Haliotis from California, with faunal and 

 geographical notes" [H. fuigens var. walallensis], by R. E. C. Stearns. (Proc. 

 U.S. Nat. Mus., vol. 22, no. 1191, p. 139-142). 



"A Report upon the Mollusca (excluding the Cephalopoda and Nudibranchiata) 

 obtained by the Royal Irish Academy Cruises of 1885, 1886, and 1888," by 

 G. W. Chaster [a valuable list with localities and notes on distribution and 

 nomenclature ; Sppralina, n.g. for Turbo spiralis Montagu ; Jordaniella, n.g. 

 for Turbo nivosa Montagu]. 



Paludestrina jenkinsi Smith at Droylsden, Lancashire.— On the 6th of 

 May last, I searched the canal at Droylsden for shells. In the vicinity of the 

 tunnel at " Daisy Nook," Waterhouses, I had little success, molluscan life being 

 almost absent, owing, probably, to the lack of aquatic vegetation and the stony 

 character of the canal bottom. On walking along the towing path in the direction 

 of the Droylsden cotton mills, I noticed a promising patch of the "water moss" 

 (Fontinalis aniipyretica) and upon passing my scoop through this I was surprised to 

 find some specimens of the carinated form of Paludestrina jenkinsi. The shells 

 increased in numbers as I advanced, and between the bridge (over which crosses 

 the roadway leading to Littlemoss) and the first cotton mill, they swarmed on the 

 stony bottom of the canal ; but near the mill, where the hot water from the engines 

 is turned into the canal, I obtained but few specimens. I carefully examined the 

 sides of the canal, the walls, and roots of grass growing in the shallow water with- 

 out finding a single specimen in either case. A few weeks later I made another 

 thorough search in the same locality'and found that a considerable change had taken 

 place in the habits of P. jenkinsi. They were now to be found in great abundance 

 on the aquatic vegetation and roots of grass, where they had doubtless gone to 

 deposit their young, for on washing the shells under the water-tap at home, the 

 mollusks became very active and deposited hundreds of young in the shallow basin 

 in which they were placed. The adult shells vary much in size and degree of carina- 

 tion. Fully 80 per cent are the carinated form. I cleaned out the animals from 

 over 300 shells of the various forms, taken in June and July, and found that every 

 individual contained young. If, as I believe it is generally understood, the sexes 

 are separate in Paludestrina, I should like to know what becomes of the males ? 

 I cannot offer any opinion as to how this species has been introduced into the 

 Droylsden canal. Very little, if any, timber is brought up here, the boats being en- 

 gaged in the coal and cotton traffic, so " Baltic timber" can hardly be the solution of the 

 mystery of its introduction, which must have been quite recent, for this particular 

 portion of the canal was, up to two years ago, the favourite hunting ground of 

 Manchester conchologists, and it hardly seems possible they could have overlooked 

 the shell. — Fred Taylor {Read be/ore the Society, Nov. 8th, 1899). 



