94 LIMAX ARBORUM. 
This darkening of the body would seem to be a response to the character 
of its habitat in the mountains or at the more extreme points of its geo- 
graphical range, as it has been noticed in the northern and north-western 
parts of this country, in 'l'ransylvania, Portugal, and Italy. In the latter 
country the transition from the ordinary glaucous form to the uniformly 
dark variety can be traced as the mountains are ascended. 
VARIATIONS IN COLOUR AND MARKINGS OF ANIMAL. 
Var. flava Weinland, Weichth. Schwab. Alb., 1876, p. 27. 
Bopby and SHIELD greenish-yellow. Formula 000 000. 
Though no remark is made in the description, it is probable that the lateral band- 
ing on the shield and the inner bands on the body will be faintly perceptible. 
Wurtemburg—(Weinland, op. cit.). 
Var. glauca Clarke, Ann. and Mag. Nat. Hist., 1843, p. 334, pl. 11. 
ANIMAL of a pale bluish-grey colour, with a glaucous-shade, showing a slightly 
paler mid-dorsal line, margined on each side by an indistinct darker line; SHIELD 
with a dark lateral band on each side. Formula 001 100. 
Surrey—A colony of the sea-green variety on an old oak in garden, Bramley hill, 
Croydon (K. MeKean, Proce. Croydon Soc., 1883, p. 147). 
Ireland—(B. J. Clarke, op. cit.). Killarney, Kerry, Sept. 1884, Howard Bendall. 
Var. subrufa Le Comte, Bull. Soc. Mal. Belg., 1871, p. Ixv. 
Limax arborum var. subrufa Le Comte, op. cit. 
Amalia marginata var. mongianensis Paulucci, Fauna Calabria, p. 1880. 
Lehmannia marginata var. pallens Less. & Poll., Mon. Limac. Ital., 1882, p. 16, 
Lehmannia marginata var. reguienit Poll., Boll. Mus. Zool. Torino, 1896, p. 1. 
Limax flavus var. lineolatus Collinge, Zool., April 1890, p. 145. 
30pDY colour yellow or ochreous, inner bands bordering the slightly paler keel- 
line ; SHIELD with darker lateral bands. Formula 001 100. 
The var. subrufa s.str. has a rufous-yellow ground with a greenish shade, caudal 
end of body blackish; shield bands dark grey. 
The sub-var. mongianensis is dull ochreous, fuscous-brown on the back, with 
paler dorsal-line ; shield with black lateral bands, and clouded with fuscous-brown. 
The sub-var. requienii is ochraceous, darker dorsally, with yellowish dorsal-line; 
shield with blackish lateral zones, and minutely spotted anteriorly and laterally. 
The sub-var. pallens is pale, with a paler dorsal-line; shield faintly banded. 
The sub-var. lineolata is yellowish, with an ashy-grey dorsal-line and dark- 
brown inner bands; shield with dark lateral bands; tentacles yellowish. 
Oxford—Sub-var. dineolatau, Nelthorpe, near Banbury (Collinge, op. cit.). 
Norfolk E.—Sub-var. pallens, from near Norwich, in Br. Mus., T. D. A. Cockerell. 
Gloucester E,—Sub-var. pallens, labelled ‘‘Cheltenham,” specimens in British 
Museum (T. D. A. Cockerell). 
Derby—Var. subrufa, Chapel-en-le-Frith, June 1897 ! C. Oldham. 
York Mid W.-—Var. subrufa, Mickley, Aug. 1889 ! W.D.R. 
Aberdeen S.—Var. subrufa, Mony Musk Woods, Sept. 1886! C. B. Plowright. 
France—Sub-var. requienii, Vizzavona, Corsica (Pollonera, op. cit.). 
Belgium—Var. suwbrufa, plentiful, Bois-de-Lessines (Le Comte, op. cit.). 
Italy—Sub-var. mongianensis, Monte Pecoraro, near Mongiana, Calabria (Pau- 
lueci, op. cit.). Sub-var. pallens, Valle d’Antigorio, Piedmont (Less. & Poll., op. cit. ). 
Var. rosea Van den Broeck, Annales Soc. Mal. Belg., 1870, p. 49. 
Limax arborum var. voseus Van den Broeck, op. cit. 
Limax arborum var. coloratus Van den Broeck, op. cit., p. 53. 
Limax arborum var. nemorosa Baudon, Mém. Limac. Oise, 1871, p. 19, pl. 4, f. 10-12. 
Limax agrestis var. saxorum Baudon, op. cit., p. 16, pl. 2, f. 1. 
Limax altilis Fischer, J. de Conch., Jan. 1877, p. 49. 
ANIMAL with main and inner bands more or less distinet; SHIELD with well- 
marked lateral band on each side. Formula 021 120, 
The var. rosea s.str. has the ground colour rosy-white, becoming of a rufous brown 
on the back; inner band broad and well marked, and of a distinetly zig-zag pattern, 
bordered by a rosy-white line; main band repesented by an irregular and inter- 
rupted row of black spots; shield reddish-brown, paler than the back; the black 
lateral bands do not reach beyond the anterior third of its length; the left band is 
margined internally, and that of the right side externally, by a white line. 
