126 AGRIOLIMAX LEVIS. 
closed by the excavations for the foundations of the Admiralty Buildings, 
Westminster. Mrs. McKenny Hughes reports it from the beds at Barnwell 
Abbey, in Cambridgeshire ; and Mr. J. P. Johnson from a deposit on the 
foreshore, at West Wittering, Sussex; and also from the Uphall Brickyard, 
near Ilford, in South Essex. 
Variation.—Dr. Simroth affirms that A. /wvis is subject, under certain 
conditions, to seasonal variation or Horswomorphism, the var. grisea indi- 
cating the typical summer garb of the species when living on dry, 
cultivated lands. This light-grey form, which is occasionally blackish 
on the back, or may be tinged with reddish, is only found during the 
summer months and on warm and dry spots, but with the advent of the 
cool, damp days of autumn, they gradually change to the dark unicolorous 
winter variety, this change being regarded as a result of the greater degree 
of cold and moisture to which they are subjected at that season. 
The examples, however, which dwell by the constantly cool and moist 
margins of rivers and pools are not subject to this change, retaining during 
life the dark uniform colouring typical of the species. 
Dr. Simroth also traces a connection or correlation between the size of 
the mantle and the degree of moisture in the inhabited locality, the excess 
of moisture being said to cause a fuller swelling of the body and an exu- 
berant growth of the mantle. 
Dr. Baudon has described a monstrosity of this species as var. ‘ntentacu- 
lata, which was totally destitute of any trace of tentacles. 
The world-wide distribution attained by this little species has led to a 
number of names being applied to it, which, according to Simroth and 
others who have especially studied the subject, merely indicate forms 
differing little from typical specimens, and at the most represent geo- 
graphical races, in which latter category the American and Australasian 
forms may appropriately be placed. 
VARIATIONS IN COLOUR AND MARKINGS OF ANIMAL. 
Var. lacustris Bonelli, 1822, in Sched. Mus. 'Taurin. 
Limax lacustris Bonelli, op. cit. 
Limax levis var. maculata T. D. A. Cockerell, J. of Conch., July 1886, p. 79. 
Limax levis var. rufrapunctatus W. ¥. Collinge, J. of Mal., Dec. 1898, p. 22. 
Differs from the type in being irregularly spotted with dark brown. 
Mr. G. E. Mason has observed that this variety is of more aquatic habits in 
Surrey than the typical form. 
Surrey—Sub-var. maculata, marshy ground at north end of Barnes Common, 
1886, T. D. A. Cockerell. 
Warwick—Sub-var. maculata, sparingly (W. E. Collinge, J. of Mal., op. cit.). 
Italy—Var. /acustris, Laghi d’Avigliana; Turin; Rivarossa Canavese and Lago 
’Azeglio (Lessona & Pollonera, Monog. Limace. Ital., 1882, p. 48). 
Var. grisea ‘l'aylor, var. nov. 
ANIMAL light grey, with grey mid-sole and pale side areas. 
Ireland—A greenish-grey variety on railway embankment in marsh, Down- 
patrick, County Down, March 1898, R. Welch. 
Germany—Leipzig and Halle-am-Saale (Simroth, Zeitsch. Wiss. Zool., Aug. 1885). 
Finland—(Simroth, Ber. Naturf. Ges. Leipzig, 1898, p. 39). 
Var. arenaria Gassies, Malac. Aquitaine, pp. 117-119, pl. 1, f. 1. 
Limax arenarius Gassies, op. cit. 
ANIMAL ereenish-bronze or blackish above ; SHIELD paler and tending to dirty- 
yellow ; NECK greyish-yellow paling towards the shield. 
France—At margin of fish-pond, below the dunes at Lacanau, June 1860; on the 
high-road from Teste at Lamothe; also at Andernos, and under stones in the salt 
meadows at Teich, all in Aquitaine (Gassies, op. cit. ). 
