SOME DORSET LAND SHELLS. 197 



extremely rare variety, there being only two records in 

 Taylor's Monograph. 



Passing on to the other species in the collection, there are 

 two specimens of H. nemoralis, var. fascialba (rubella 00300), 

 taken by Mrs. Swanton in Duncliff Wood. This interesting 

 form has also been observed in Somerset.' 



A series of Helicigona arbustorum, a frequent species in 

 hedges about Todber and Marnhull. The following varieties 

 are included : fuscescens, shell lacking the supra-peripheral 

 band ; alpicola, smaller than type, spire more raised ; luctuosa, 

 sub-var. nigrescens, shell thick, black all over. One specimen 

 from the neighbourhood of Marnhull. This very interesting 

 form, hitherto unknown in Britain, is described in my " Pocket 

 Guide "* (p. 45) as var. picea, which differs, however, in being 

 very thin. The following varieties of the ubiquitous Helix 

 aspersa have been found in the Stowers district : flammea, shell 

 with pale flame-shaped markings and blotches of dark areas, 

 fasciata, s.v. albofasciata, with a white band at. the periphery, 

 s.v. puncticulata, reddish, spotted with yellow, and having a 

 narrow yellow peripheral band ; also specimens approaching 

 the var. clathrata, in which the dark ground colour is broken 

 up into squares and oblongs by pale transverse yellowish 

 lines. The collection also includes shells of H. aspersa broken 

 by thrushes and by field mice ; in those attacked by mice the 

 spire has been neatly removed, they ware found in mouse 

 " runs " amongst long grass. 



Hyalinia cellaria, Pyramidula rotundaia var. scalaris, 

 Hygromia rujescens var. albocincia, and Helicigona lapicida, 

 all from Stour Provost, and the rare Vertigo minutissima 

 taken by Dr. H. Brooksbank at Weymouth. 



* I shall be pleased to send a copy of the " Pocket Guide to the 

 British non -marine Mollusca " to any conchologist who may feel 

 inclined to apply for it. The postage, fourpence, must be prepaid 

 by the applicant. It contains descriptions of all the chief varieties, 

 of the fossil species which occur in Post Pliocene deposits other than 

 the Forest Bed series, and of introduced species. 



