WOODWARD : LIST OF BRITISH NON-MARINE MOLLUSCA. 367 



Sphcerhwi ovale Fer. — The British form that has long passed under 

 this name is quite distinct from all the different forms that go by it on 

 the continent, where the British form appears unknown, so that Gray's 

 name of S. pallidum should be employed. 



Pisidium Pfeiffer, 182 1. — Dall {Froc. Biol. Soc. Washington, xvi,, 

 p. 7) makes this a section of the genus Corneocyclas (Fer, MS.) De 

 Blainv. ("Diet. Sci. Nat.," xii., 1818, p. 278). Since, however, De Blain- 

 ville admits that Corneocyclas is a synonym for Cornea Megerle (181 1) 

 which Dall rightly makes a synonym for Sphcerium, while of the species 

 cited the majority are referable to Sphcerium, Corneocyclas must also be 

 regarded as a synonym for Sphi^riuin. Moreover, since De Blainville 

 nowhere cites Tellina pusilla Miiller under it and there is no proof that 

 the Cyclas fontinalis Drap. which he does cite is the same species, it 

 is hardly permissable to arbitrarily select pusilluni as the type of 

 Corneocyclas to-day and ignore the prior claim of Pisidium, already 

 founded to include inter alia the Cyclas fontinalis of Drap. 



The specific names here given are provisional. I am now en- 

 gaged on the group which is readily separable by hinge characters, 

 but owing to confusion in the literature the final nomenclature must 

 wait till my investigations are a little further advanced. 



The Land Shells of the Turton District. — The Urban District of Turton is 

 situated about three miles north of the town of Bolton. I cannot find that this district 

 has ever been worked by any conchologist, and after seeing the numerous species of 

 mollusca found in Castleton, Derbyshire; Whalley, Chatburn, and other places in 

 Lancashire, I 'came to the conclusion that this district is poor as regards this section 

 of animal life. I have, however, spent much time during the past two years in 

 collecting the land shells here with the following results : — I have not as yet taken 

 any on the bleak moorland, but in the less elevated portions of the district I have 

 found Hyalina cellaria fairly common at the foot of walls, and in gardens ; H. alliaria 

 underneath stones, common throughout the district ; H. pura, one specimen only as 

 yet discovered ; H. crystallina in similar situations to H. alliaria, but not so com- 

 mon ; H. fidva, found in two localities at rest on stones and broken bricks ; H. 

 excavata, only taken in one old lane, but seems to be fairly plentiful; H.nitidula, 

 in several localities and fine specimens ; Helix rotundata is the commonest land shell 

 of the district, twenty and more specimens may sometimes be found on one stone ; 

 H. rotundata var. alba in one spot only; H. rotundata var. rufula in the same 

 place, this variety is of a light buff colour, without the red-brown dashes of the 

 type ; H. hispida, this species is very local and seems confined to a little spot a 

 few yards square; Azeca trideiis, one specimen only; CoMicopa lubrica, fairly 

 common all over the district in suitable localities; Carychium ininimuni, found in 

 one moist shady spot, underneath stones, and among the moss of the damp wall. 

 During the last fortnight I have added to the above Vitrina pellucida taken on 

 exposed cabbage leaves on' November 5th, and several times since. The cabbage 

 leaves had been laid out early in October and it occurred to me that possibly a 

 certain stage of decay was necessary to render them attractive to this species. — 

 J. W. Baldwin {Read before the Society, December 10, 1902). 



