112 AGRIOLIMAX AGRESTIS. 
''owards the confines of its natural range A. agrestis usually presents a 
more uniformly dark and, according to Simroth, more primitive colouring 
than in the British Isles, and it is extremely 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- 
har 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. Say., 1857, p. 10. 
Limax agrestis var. albitentaculata Dum. & Mortt., op. cit. 
Agriolimax 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, 1860, p. 462). 
Sussex W.—Ratham, usually small, July 1884, W. Jeffery. 
Middlesex—Bedford Park, Chiswick, amongst Carduus arvensis with type 
(T. D. A. Cockerell, Sci. Gossip, Jan. 1887). Churchyard-bottom wood, Highgate, 
May 1889, H. Wallis Kew. 
Worcester—Garden, Stourport, July 1888 (Williams, J. of Conch., July 1888). 
Stafford—Field, Stafford, Dee. 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 Clapham churchyard (H. Richardson, J. of C., 
April 1886). Bolton Abbey, April 1883! W.D.R. 
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 Dundrum, Rk. Welch. 
Dublin— Under a heap of hay, Raheny (Scharff, Slugs of Ireland, 1891, p. 527). 
Tipperary S.—Near Clonmel, April 1888, A. H. Delap. 
Sweden—Shore of Kiirrstorp Lake, Ronneby (Westerlund, Mal. Iaktt., 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 filans Moquin-Tandon, Hist. Moll. France, 1858, ii., p. 22. 
Limax agrestis § melanocephalus Moquin-Tandon, op. cit. 
Limax agrestis var. flavi-clypeus Dum. & Mort., Moll. Sav., 1857, p. 10. 
Limax agrestis var. atritentaculata Dum. & Mort., op. cit. 
Agriolimax pallidus a immaculatus Less. & Poll., Mon. Limac. Ital., 1882, p. 1. 
Limax agrestis var. albidus Vaniot, Moll. Amiens, 1883, p. 3. 
ANIMAL pale and unspotted ; SHIELD often tinged with yellowish. 
The sub-var. melanoecephala is greyish-white, with a black head. 
The sub-var. atritentaculata is described as white with black tentacles. 
The sub-var. albida is greyish-white. 
The sub-var. immaeulata is pale and unicolourous, with yellowish shield. 
The sub-var. filans is whitish, shield yellowish or ash coloured. 
The sub-var. flavielypea has the shield yellowish. 
