ARION ATER. 185 
VARIATIONS IN COLOUR AND MARKINGS OF ANIMAL. 
Var. bocagei Simroth, Zool. Anz., 1888, no. 272. 
Arion rufus var. glauca Colbeau, Bull. Soc. Mal. Belg., 1867, p. 46. 
ANIMAL uniformly white, except the foot-sole, which is black. 
The young are of a lively red, the head somewhat lilac, and the foot pale, later 
the dorsum becomes whitish, changing to blackish-brown towards the sole, which is 
fairly dark ; as they reach the adolescent stage the back becomes whiter, the white- 
ness extending towards the sole, which becomes darker, a phase figured by Simroth 
(Nacktschn. Portug.-Azor. Faun., 1891, pl. 13, f. 1); it is only when fully adult that 
the animal assumes the almost uniformly white body and black foot-sole. 
The sub-var. glauea is greenish-white, with greyish sides, foot-sole blackish-grey, 
head, neck, and tentacles purplish-black, and though verified by Colbeau as a young 
stage of rufa is almost identical with the immature stage of the true bocagei. 
Under the name of bocage?, various forms have been recorded as British which 
have little or no relation with that variety. 
Belgium—Sub-var. glauca, Forest of Soigne, and a few other places. 
Portugal—Var. bocagei, Las Caldas do Gerez in Minho (Simroth, op. ecit., 1891). 
Var. albolateralis Roebuck, Journ. of Conch., 1883, p. 39. 
Arion empiricorum var. medius Jensen, Indberetning, 1872. 
ANIMAL black, sides quite white, the two colours being sharply defined ; foot pale, 
with orange fringe. 
Sub-var. media has a black dorsum and white sides, with an intermediate pale- 
brown area, which extends over the front and sides of the shield, and is tentatively 
placed here, though Prof. Cockerell regards it as probably a variety of A. subfuscus. 
This var. a/bolateralis is restricted to the north and west of the British Isles. 
Simroth, however, speaks of a black and white variety from Bremen. 
ENGLAND AND WALES. 
Cornwall W.—A sub-var. with grey foot-fringe at Penzance, Sept. 1885! E. D. 
Marquand. Falmouth, aspecimen in British Museum, T, D. A. Cockerell, Sept. 1884. 
Cornwall E.—Abundant on Queen’s Hill, St. Columb, June 1885! Wim. Vinson. 
St. Austell, Sept. 1904! C. P. Richards. 
Devon S.—Topsham, Ang. 1892, L. E. Adams. 
Wilts. S.—Salisbury, Aue. 1904! A. D. R. Bacchus. 
Dorset—Chideock, Bridport, Aug. 1885! A. Belt. Abbotsbury, May 1889! W. 
Whitwell. Old British Camp, Charminster, Aug. 1889! T. F. Burrows. Maiden 
Castle, T. F. Brown (Mansel-Pleydell, Moll. Dorset, 1898, p. 5). 
Sussex W.—Ningleton, not very characteristic, July 1884! W. Jeffery. 
Kent E.—A colony at Kingsdown, Sept. 1891! L. E. Adams. 
Gloucester E.—Leckhampton, June 1885! J. Madison. 
Monmouth-—Shirenewton, July 1890! E. J. Lowe. 
Stafford—Staftord, 1886! L. E. Adams. 
Salop—Minsterley, May 1887! L. E. Adams. Oswestry, June 1885 ! B. Hudson. 
Cardigan—Aberystwyth, May 1888 ! E. Collier. 
Montgomery—Timber-yard, Welshpool, June 1889! J. Bickerton Morgan. 
Merioneth—Nant-y-Mor, June 1901! W. Denison Roebuck. Bont ddu near 
Dolgelly, and slopes of Cader Idris, July 1886! F. G. Fenn. 
Carnarvon—Bettws-y-Coed. Aug. 1865, C. Ashford. Dinas station! and abun- 
dant at Trefriw, July 1883! W. Denison Roebuck. 
Anglesea—Llanfaes, Sept. 1886! J. G. Milne. 
York S.W.—Hedon, April 1904, and Danes Dyke, T. Petch. 
Northumberland—River side, West Woodburn, Sept. 1886! R. Howse. 
Westmorland and Lake Lancashire—Hill Fell, May 1885! W. West. Coniston, 
April 1887! 8. C. Cockerell. Greenodd near Ulverston, Sept. 1904! 'S. Lister Petty. 
Isle of Man—bBradda Head, 1880, L. E. Adams. Kirk Braddan and Onehan, 
Aug. 1885 (J. Moore, Sci. Goss., April 1886, p. 94). Port Erin, 1902, H. Overton. 
SCOTLAND. 
Sutherland E.—Golspie Burn, June 1884! W. Baillie. 
