112 AGRIOLIMAX AGRESTIP. 



Towards the confines of its natural range A . agrestw usually presents a 

 more uniformly dark and, according to Siniroth, more primitive colouring 

 than in the British Isles, and it is exti-emely significant that this ancient 

 garb should be the salient character of the species when living in countries 

 beyond and almost encircling our most active evolutionary area, this pecu- 

 liar distribution rendering it likely that the unicolorous forms at one time 

 occupied this area, but have been supplanted by the distinctly maculate 

 forms which now predominate there. 



About Tromso and its more northern Norwegian habitats the species is 

 usually of an uniformly pale brown; in southern and extreme south-western 

 Europe it assumes a more or less uniform reddish, blackish, or dark-grey 

 hue ; while in south-eastern Europe, Asia Minor, and Turkestan, a grey 

 form with or without faint spottings is the prevalent type. 



This remarkable uniformity in colouring is associated with and may be 

 in some measure correlated with the presence of a stronger and more ex- 

 tended keel, as' this feature has been observed in the Norwegian, South 

 European, Portuguese, and Asiatic specimens: 



Although as far as possible all the names given to the various forms are 

 enumerated, and their characters pointed out when ascertainable, yet many 

 of them are practically identical or denote quite insignificant variations, 

 and are included solely with the object of rendering the account of the 

 species as complete as possible. 



VARIATIONS IN COLOUR OF ANIMAL. 



Var. albitentaculata Dum. & Mort., Moll. Sav., 1857, p. 10. 



Limax agrestis var. albitentaculata Dum. & Mort., op. cit. 

 Agrtolhnax agrestis var. alba Cockerell, Nautilus, Oct. 1891, p. 70. 



Animal with body and tentacles pure white. 



Dorset— Portland, Aug. 1886 ! J. Madison. 



Isle of Wight— (G. Guyon in Venables' Guide to Isle of Wight, 1S60, p. 462). 



Sussex W. — Kathani, usually small, July 1884, W. Jeffery. 



Middlesex— Bedford Park, Chiswiek, amongst Carchiu's arpcnsis with type 

 (T. D. A. Cockerell, Sci. Gossip, Jan. 1887). Churchyard-bottom wood, Higlinate, 

 May 1889, H. Wallis Kew. . o = . 



Worcester— Garden, Stourport, July 1888 (Williams, J. of Concli., July 1888). 



Stafford— Field, Stafford, Dec. 1885 ! L. E. Adams. 



Lincoln N. — Claythorpe, July 1887 ! J. E. Mason. 



York N.E.— Farwath Bridge', Aug. 1886 ! W. Denison Roebuck. 



York Mid W.— By the walls of Clapliam churchyard (H. llicliard.son, J. of C, 

 April 1886). Bolton Abbey, April 1883 ! W.D.K. 



Lancashire S.— Walton-le-Dale, June 1889 ! W. H. Heathcote. 



Durham— Lane near Old Elvet, Durham, April 1884 ! Baker Hudson. 



Lanark— Wilderness Wood, Cadder, Aug. 1886 ! W.D.R. 



Down— Graveyard, Downpatrick Cathedral, and about Dundruni, K. AVelch. 



Dublin— Under a heap of hay, Raheny (Schartf, Slugs of Ireland, 1891, p. o27). 



Tipperary S.— Near Clonmel, April 1888, A. H. Delap. 



Sweden— Shore of Karrstorp Lake, Ronneby ( Westerlund, Mai. laktt. , 1866, p. 553 



Finland— Nykyrka in South Finland (Luther, Moll. Finland, 1901, p. 48). 



Var. pallida Schrenk, Land u. Sussw. Moll. Livlands, 1848. 



Limax pallidus Schrenk, op. cit. 



Limax agrestis y Jilatis Moquin-Tandon, Hist. Moll. France, 1855, ii., p. 22. 



Limax agrestis S melanoceplialus Moquin-Tandon, op. cit. 



Limax agrestis var. Jiavi-clypcus Dum. & Mort., Moll. Sav., 1857, p. 10. 



Limax agrestis var. atritentaeulata Dum. & Mort., op. cit. 



Agriolimax pallidus a immaculatus Less. & Poll., Mon. Limac. Ital., 1882, p. 51. 



Limax agrestis var. albidus Vaniot, Moll. Amiens, 1883, p. 3. 



Animal pale and unspotted ; shield often tinged with yellowish. 



The sub-var. melanoeephala is grevish-white, with a black head. 



The sub-var. atritentaeulata is described as white with black tentacles. 



The sub-var. albida is greyish-white. 



The sub-var. immaculata is pale and nnicolourous, with yellowish shield. 



The sub-var. fllans is whitish, shield yellowish or ash coloured. 



The sub-var. flavielypea has the shield yellowish. 



