AKION CIRC0MSCRIPTUS. 



233 



Geographical Distribution. — Arion circumscripius being an earlier 

 evolved species than Arion hortensis, has naturally therefore probably 

 acquired a wider distribution, although its range is as yet far from being 

 accurately known, as it has been in the past and is still so frequently 

 confused with A. kortensis, under which name it is usually recorded. 



It has been reported under its own name, or under that of Arion 

 hortensis, from the British Isles, Germany, France, Belgium, Switzerland, 

 Scandinavia, Austro-Hungary, North Italy, and Russia, but has not yet 

 been detected in the Iberian Peninsula, where it will probably eventually 

 be found. 



It has also been observed in North America, where it has probably been 

 accidentally introduced. 



In the British Isles, it is distributed entirely over the country, and 

 probably exists in all our comital and vice-comital areas. 



Geographical Distribution 



of 



Arion circumscriptus Johnst. f 



^^H Recorded Distribution. 

 I M Probable Range. 



Fig. 240. 



ENGLAND AND WALES. 



Channel Isles— St. Sampson's, Guernsey, Sept. 1891 ! B. Tonilin. 



PENINSULA. 



Cornwall W.— Gardens, Truro, Apl. 1886 ! J. H. James. Penzance, Jan. 1905 ! 

 Lionel E. Adams. Var. neustriaca, Penmon, Falmouth, Apl. 1884 ! H. Fox. 



Cornwall E. — Type and var. neustriaca, garden bank, St. Columb, May 1885 ! 

 W. Vinson. 



Devon N.— Northam, Nov. 1885, W. A. Gain. Belstone, Okehanipton, Sept. 

 1904 ! Rev. W. W. Mason. 



Somerset S.— Porlock, Aug. 1892 ! Lionel E. Adams. 



Somerset N.— Recorded in Adams' " Census," 1902, p. 222. 



CHANNEL. 



Wilts. N.— Clyffe Pybavd, Swindon, Aug. 1904 ! Rev. E. H. Goddard. 



Wilts. S.— Garden, Dunollie, Bourne avenue, Salisbury, Sept. 1904 ! A. R. D. 

 BfLoohns 



Dorset— Sub-var. amhigua (T. D. A. Cnekerell, Conch., Sept. 1891, p. 33). Sub- 

 var. grisea, Chideock, iiridport, Aug. 1885 ! A. Belt. Snb-vav. snbalbida, Bailey 

 Gate (Cockerell, op.c., p. 35). Sub-var. armoricana, Stuiminster Marshall (id.. I.e.). 



