ARION CIRCUMSCRIPTUS. Zao 
Geographical Distribution.—Arion circumscriptus 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. hortensis, under which name it is usually recorded. 
It has been reported under its own name, or under that of Avion 
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. 
ie 
Geographical Distribution 
of 
Arion circumscriptus Johnst. 
ES) Recorded Distribution. 
[ ‘ q Probable Range. 
Fic. 240. 
ENGLAND AND WALES. 
Channel Isles—St. Sampson’s, Guernsey, Sept. 1891 ! B. Tomlin. 
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, Okehampton, 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 Pybard, Swindon, Aug. 1904 ! Rev. E. H. Goddard. 
Wilts. S.—Garden, Dunollie, Bourne avenue, Salisbury, Sept. 1904! A. R. D. 
Bacchus. 
Dorset—Sub-var. ambigua (T. D. A. Cockerell, Conch., Sept. 1891, p. 38). Sub- 
var. grisea, Chideock, Bridport, Aug. 1885 ! A. Belt. Sub-var. subalbida, Bailey 
Gate (Cockerell, op.e., p. 35). Sub-var. a7moricana, Sturminster Marshall (id., l.e.). 
