TAYLOR: ON HELIX ARRUSTORUM. ■ 249 



It may be remarked here that M. Fagot considers H. cani- 



gonensis and H. xatartii to be distinct from arbustorum, and from 



each other. 



Var. Baylei Lecoq. Shell much smaller, conoid, extremely thin and trans- 

 parent, clear uniform greenish yellow. 



On Mont Dore, France (Moquin-Tandon). Mr. Ponsonby 



informs me that he has received "'an extraordinarily thin variety' 



from Silesia; it may possibly be this form, known hitherto from 



France only. Not yet discovered in this country. 



Var. marmorata Taylor. Shell similar to typical form, but destitute of band. 



Found at Castleford, Ferrybridge, and Airton, Yorkshire. 

 I have also found it at Frutigen, Switzerland. 



Var. flavescens Moquin-Tandon. Shell yellow or whitish-yellow, without 

 band. {=^morbosa-albina Westerlund). 



Dr. Jeffreys says "not very uncommon". This variety gener- 

 ally lives in company with the typical shell and is not segregated. 

 It is found in Yorkshire at Scarbro', Knaresbro', Pontefract, 

 Brough, Goole, Airton, Brayton near Selby, Hessle and Worton, 

 and at Dringhouses and Bishopthorpe near York. In other 

 counties, it is recorded from Kent; from Westmoreland; from 

 Oxon, at Banbury; from Stechford, Staffordshire; Whitlingham, 

 Norfolk; Peterboro', Northamptonshire; Whittlesey, Cambridge- 

 shire; and Mr. Nelson has collected it at Hartington, Bakewell 

 and Dovedale in Derbyshire. 



In Scotland, Dr. White has found it near the sea in Fife. 



In Ireland^ Mr. Thompson collected a few at Larne, Co. Antrim. 



I have found it in Switzerland, at Lausanne, Interlaken and 

 Frutigen; Moquin-Tandon quotes it from France; and it is given 

 for Sweden by Westerlund under inorbosa-albina. 



"The epidermis appears to be more tender than that of its 

 darker brethren, for it is more frequently corroded or effaced, and 

 after death it is more quickly deciduous (Ashford). 



