126 AGMOLIMAX LiEVIS. 



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. Iwvis is subject, under certain 

 conditions, to seasonal variation or Horseomorphism, 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. intentacu- 

 lafa, 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 apphed 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, 1S22, in Sched. jMus. Taurin. 



Limax lacustris Bonelli, op. cit. 



Litnax larvis var. macu/ata T. D. A. Cockerel!, J. of Conch., July 1886, p. 79. 



Liiiiax larvis var. rufrapunctatus W. E. Collinge, J. of Mai., Dec. 1898, p. 22. 



Differs from the type in being ivregulaily spotted witli dark brown. 



Mr. G. E. Mason has ohsei'ved tliat tliis variety is of more aquatic habits in 

 SuiTey tlian the typical form. 



Surrey— Suli-var. iiincnliifn, marshy ground at north end of Barnes Common, 

 1886, T. D. A. Coclverell. 



Warwick— Sub-var. iiinrulatu, sparingly (W. E. Collinge, J. of Mai., op. cit.). 



Italy — Var. Im'iistris, Laghi d'Avigliana ; Turin; Kivarrissa Canavese and Lago 

 d'Azeglio (Lessona & Pollonera, Monog. Limac. Ital., 1882, p. 48). 



Var. grisea Taylor, var. nov. 



Animal light grey, with grey mid-sole and pale side areas. 



Ireland— A greonish-grey \ariety on railway embankment in marsh, Down- 

 patrick, (.'ounty Down, March ISilS, R. "Welch. 



Germany— Leipzig and Halle-am-Saale (Simroth, Zeitsch. Wiss. Zool., Aug. 1885). 



Finland— (Sinn-oth, Ber. Naturf. Ges. Leipzig, 1H!)8, p. 39). 



Var. arenaria Gassies, Make. Aquitaine, pp. 117-119, pi. 1, f 1. 



f^/ii/ax atriiarius Gassies, op. cit. 



Animal gi(!eiiisli-liroiize or lilackish above ; shield iiaU-r and tending to dirty- 

 yellow ; NECK gvcyish-yellow paling towards tlie sliield. 



France— At margin of fish-pond, below thcdnnes at Laeanau, June 1860 ; on the 

 high-road from Teste at Lamothc ; also at Andcrnos, and under stones in the salt 

 meadows at Teich, all in Aijuitaine (Oassies, op. cit.). 



