52 JOURNAL OF CONCHOLOGY, VOL. l6, NO. 2, AUGUST 30, I919. 



been employed, species previously overlooked or non-existent in this 

 part of the country like Hygromia la/ibrosa (Margate), Clausilia dubia 

 (Dover Castle), and now H. septe7nspiralis and H. patula (Kearsney) 

 have turned up, and it may be that they have been deliberately 

 introduced. I have not adduced Helicelln eiegatis ( terrestris ) in sup- 

 port of this theory as it was found, I believe, before the days of coal 

 boring, and Eulota fruticu/n, another Lydden species, has also been 

 found in localities so far away that it must be cleared from this 

 suspicion. On the other hand it seems quite possible that some 

 reader of Mr. Maurice Hewlett's romances may be going over the 

 county, a la Senhouse, acclimatising snails instead of plants, and, if 

 so, I hope he will communicate with me and save me the trouble of 

 recording his foolish exploits. 



As Mr. Kennard has pointed out, however, this part of the country 

 round Dover is the home of several plants found nowhere else in the 

 county, so it may be that species with a restricted range are found 

 with them, but before introducing such shells as II. septemspiralis 

 and H, patula as natives some proof of a wide local range appears to 

 be necessary. 



My thanks are due to Messrs. A. W. Stelfox and A. S. Kennard 

 for the identification of my shells, and to Messrs. A. S. Kennard and 

 J. R. le Brockton Tomlin for the generous gift of continental examples 

 of both species for purposes of comparison. 



Zonitoides nitidus var. viridescens Cockerell in North Staffordshire. — 



Five specimens of the rare greenish variety of Zonitoides nitidus were taken under 

 a log amongst reeds and rushes on the edge of a disused stretch of the Trent and 

 Mersey Canal, between Oakamoor and Froghall, in May of this year. A short 

 distance away the type occurs, but very sparsely, only three immature specimens 

 being taken. — W. E. Alkins {Read before the Society, June 12th, 1918). 



A Scalariform Planorbis carinatus Miiller. — In a backwater of the Trent 

 and Mersey Canal, near Consall Mill, Staffordshire, a very scalariform example of 

 Platiofbis caiinatus, young, was taken on June 1st, 1918. In addition to the fol- 

 lowing species : — PI. carinatus Miiller, PI. corneiis Linne, PL vortex Linne, 

 I.immra stagnalis Linne, Acroloxus lacustris Linne, and Valvata piscinalis Miiller, 

 all of which were present in great numbers on the reeds, an unusually large form 

 of Physa fontinalis Linne was also taken in some abundance. — W. E. Alkins 

 {Read before the Society, June 12th, 1918). 



