86 I'hc bish A^aturalist. April 



ADDITIONAL NOTES ON THE LAND AND FRESH 

 WATER IMOLLUSCA OF NORTH-WEST DONEGAL. 



BY A. \V. STElyFOX, A.K.I.B.A. 



It lias now become almost an annual occurrence for some of the 

 most prominent English conchologists to spend their holida^-s 

 with us in Ireland. Last year Dr. Chaster of Southport, Mr. 

 E. Collier of Manchester, and Mr. C E. Wright of Kettering 

 were the only members who could join us, while Mr. R. W^elcli, 

 Mr. J. N. Milne and myself formed the native contingent. 

 Mr. F. Balfour-Browne was also with us for a few days, and 

 his large beetle-net proved a most useful addition to our 

 collecting implements. We adopted nuich the same pro- 

 gramme as that followed by Dr. Chaster and nnself on our 

 former visit to Co. Donegal in September, 1905. for the results 

 of which see I.N., vol. xv., p. 62. These notes must be looked 

 on as supplementary to that paper, being mostly new records. 



Our itinerar\' was as follows:-— 



5th September, 190S. — We left Belfast early in the day, and 

 arrived at Dunfanagln- in time to spend the afternoon at Tra 

 more, Horn Head, the following species being recorded for the 

 first time in this locality — Helix hispida and//, nifcsccns. The 

 " colony " of Helix intcrsccta referred to in my report of 

 1905 no longer inhabits the " circus ring"' (which by the way 

 is a spot used by Mr. Stewart for the training of horses), but 

 was found to be living all over the grassy slope as far as the 

 bridge leading to the mainland. Not a single specimen was 

 taken inside or near the ring this year, while in 1905 none 

 were taken more than a few 3ards from this spot. 



6th September. — The morning was spent b\' the majority 

 of the party in further investigating Tramore, where Messrs. 

 Chaster and Wright found large quantities of wind drifted shells 

 collected as a rain-wash in a dune hollow by the recent heavy 

 rains. This material was of course composed of shells washed 

 from botli old and recent deposits. Close at hand several 

 deposits probably formed in a like manner were exposed near 

 the base of an old sand-hill which was undergoing rapid 

 erosion. The commonest shell found living at Tramore is 

 the rd7^7///rt' [12345] form oi Helix nemoralis with a white lip. 

 This form is to be found fairl\- commonly thronghout West 



