ARION ATER. 185 



VARIATIONS IN COLOUR AND MARKINGS OF ANIMAL. 



Var. bocagfei Simroth, Zool. Anz., 1888, no. 272. 



Avion rufus var. glauca Colbeau, Bull. Soc. Mai. Belg. , 1867, p. 46. 



Animal uniformly white, except tlie 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, pi. 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. g'lauca 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 bocagei, various forms have been recorded as Biitish 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. cit., 1891). 



Var. albolateralis Roebuck, Journ. of Conch., 1883, p. 39. 



Arion etnpiricorum var. incdius 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. albolateralis is restricted to the north and west of the British Isles. 

 Simroth, however, speaks of a black and white variety from Bremen. 



ENGLAND AND IfALES. 



Cornwall W. — A sub-var. with grey foot-fringe at Penzance, Sept. 1885 ! E. D. 

 Marquand. Falmouth, a specimen in British Museum, T. D. A. Cockerell, Sept. 1884. 



Cornwall E. — Abundant on Queen's Hill, St. Colnmb, June 1885 ! Wm. Vinson. 

 St. Austell, Sept. 1904 ! C. P. Kichards. 



Devon S. — Topsham, Aug. 1892, L. E. Adams. 



Wilts. S.— Salisbury, Aug. 1904 ! A. D. 11. 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. u). 



Sussex W.— Singleton, not very characteristic, July 1884 ! W. Jeffery. 



Kent E.— A colony at King.sdown, Sept. 1891 ! L. E. Adams. 



Gloucester E.— Leckhampton, June 1885 ! J. Madison. 



Monmouth— Shirenewton, July 1890 ! E. J. Lowe. 



Stafford— Stafford, 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. Asliford. 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 ! S. C. Cockerell. Greenodd near Ulverston, Sept. 1904 ! S. Lister Petty. 



Isle of Man— Bradda Head, 1880, L. E. Adams. Kiik Braddan and Onchan, 

 Aug. 1885 (J. Moore, Sci. Goss., April 1886, p. 94). Port Erin, 1902, H. Overton. 



SCOTLAND. 



Sutherland E.— Golspie Burn, June 1884 ! W. Baillie. 



