■_'-14 ARK IN INTEllMliDirs. 



Parasites. — This species is at times infested with a tiny Acki-hs of a 

 white colour, wliich in size, general aspect, and activity resembles the 

 ordinary Acurm of our larger slugs. 



Variation. — The variability of this species is not great, but it is 

 suggestive that in the south-west corner of Ireland the specimens generally 

 are much darker coloured and more strongly banded than those found in 

 England. How far this may be an effect of the moister climate, and how 

 much may be attributed to their retention of the darker colouring said by 

 Mr. Gain to be a characteristic of the earlier stages of life in England, is 

 uncertain, but it is worthy of note that this most general retention of 

 innnature colouring should be in stations furthest removed from the most 

 active evolutionary centre and where the last remaining strougliold of 

 Gcoiiiif/dciis is located. 



VARrATfONS IN COLOUR AND MARKINGS OF ANIMAL 



Var. alba Taylor. 



Animal almost pure white. 



ENGLAND AND WALES. 



Cambridge— Giantchester, Sept. 1904 ! Hiii,'h Watson. 

 Carmarthen — Near Llanelly, Sept. 1904 ! H. Rowlaml Wakelield. 



IRELAND. 



Dublin — Ditch, Foxhall Demesne, Raheny ; and Killakee, Dublin Mountains, 

 Sept. 1890 ! R. K. Scharff. 



Galway W.— Ren\ vie and Kyleniore, Marcli 1891, R. F. Stharff. 



Var. nopmalis Mo(iuin-Tandon, Hist. Moll. France, 185.'), p. 16. 



Aritm fla7>us var. norwaiis Moquin-Tandon, I.e. 



Animal yellow, with blackish head and tentacles. 



IRELAND. 



Antrim— Belfast, Dec. 1891, R. F. Scharff. 



Clare— Woodpark, Scariff, Sept. 1904 : N. 1''. Hibbert. 



Kerry— tlieat Skellis (R. F. Scharif, Irish Nat, .Jan. 1898, p. 11). 



CONTINENTAL DISTRIBI/TION. 



France — Pas de Calais (Bouohard-Chantereux, Moll. Pas de Calais, 1838, p. -23). 

 Var. pallida Moquin-Tandon, Hist. Moll. France, 1855, p. 16. 



Arion /IctvHS var. pntlidus Moquin-Tandon, I.e. 

 .-irion Jla-.'Hs var. albidtts Moquin-Tandon, I.e. 



Animal pale, back pale cinereous, with yellow or orange shield. 

 Tliesub-var. albida is whitish, yellowish beneath and also on the shield, head 

 and tentacles blackish. 



ENGLAND. 



Cornwall E.— Stenalee, St. .Vustell, Sept. 1904 ! C, P. Richards. 

 Devon N. — Belstone, Okehauipton Sept. 1904 ! Miss Daisy Mason. 



IRELAND. 



Roscommon— Mote Park, Sei)t. 1904 ! Lord Crofton. 

 Leitrim — Diunikeeran, Oct. 1904 ! Rev. J. .Median. 

 Waterford— Clonniel, Rev. A. H. Delap. 



CONTINEN TA L DIS TR IB U TION. 



France — V. pallidK and sub-v. albithi. Pas de Calais (Bouchard-Chantereux, I.e.). 



Var. plumbea Collinge, Conch., ii., 18!I2, p. 6.''). 



Anim.vl dark-grey; shield and tf 

 •am, somewhat darker medially. 



This is the var. rjri-iiri of Roebnck, 



Anim.vl dark-grey; shield and tail only slightly tinged with orange; foot-sole 

 cream, somewhat darker medially. 



/■;,r(,V„-I.V/> AND WALES. 



Cornwall E.— Stenalee, St. Austell, Sept. 1904 ! ('. P. Kichards. 



Devon N. — Belstone near Okebampton, Sept. 1904 ! Miss Oaisy Mason. 



Suifolk E. -.Meudlesham, Oct. 1904 ! A. Mavlicld. 



Norfolk W.— Didlington Hall, Sept. 1904 ! Hon. Mrs. Evelyn Cecil. 



Northampton- Kettering, Sept. 1904 ! C. K. Wright. 



Gloucester W.— Symonds Yat, Sept. 1904 ! \V. C. Blake. 



Hereford— (i.avden, j\cacia Villa, Ross, Sept. 1904 ! \\. C Blake, 



