290 VKOCEEDINGS OF TllK MALACOLOGICAL SOCIETY. 



NOTES ON TWO CASES OF TRANSrORT AND SURVIVAL OF 

 TERRESTRIAL MOLLUSCA IN THE NEW FOREST. 



By T. Leighton, F.G.S., etc. 



Bead April I9th, 1895. 



It -would be intcrcstiug to know whether Helix riqwstris, Drap., and 

 Fupa umhilicata, Drap., occur at largo in the New Forest. In 18b8 

 I was able to collect a number of specimens of these two species 

 from an old limestone tomb in lirockenhurst churchyard. The 

 neighbouring walls of the church and other memorials in the church- 

 yard were carefully examined without yielding any result. The 

 subsoil of the New Forest consists almost entirely of gravel and sand, 

 so that it is not a locality in which one would expect to find many 

 snails. I have searched the beeches in vain for Clausilia in different 

 parts of the forest ; in fact, the only snail above suspicion which I 

 have obtained in the district is a single specimen of Vitrea nitida, 

 Midi., which occurred in the northern lane leading from the village of 

 Brockcnhurst to the church. It is suggested that the two species first 

 mentioned were probably introduced Avith the tombstone on which 

 they still probably occur (they were there in July, 1894). In the 

 brickyard at lloydon, near Brockenhurst, Jlelix caper ata, Mont., and 

 JI. virffdfa, Da Costa, occur over the waste-heaps of the Headon 

 shell-beds, which are, of course, strongly calcareous. The snails 

 appear to be strictly confined to these waste-heaps, however ; they 

 cannot be found in the neighbouring hedgerows, and the beeches, even 

 in the • brickyard, are without Clausilia, so far as I could see. Here, 

 again, the snails have probably been introduced, either on the work- 

 men's tools or with brick-making plant. 



