lot MONOGRAPH OF BRITISn LAND ANTI FRESHWATER MOLLUSCA. 



Agriolimax agrestis (L.). 



Aliiv pnrvir. lit qiiir ijrrgiiiiiH fulia sectiiiitiir. ct Jiniia.s iiifrxfuiif ciiicrei a iit fiisci 

 vdluria (lesiier, de Aquatil. lilj. 4, |i|j. ■J.">4 et 2.3ti. 



JJiHtf.r riiirrcns jntn-Hs, hiniHifidatHS, pnitntsis i>istL'i", Hist. Anirn. Angl., 167S, 

 p. 1»), tab. -2, t. 16. 



Lliiin.f vhu'i-ciis iiniiiiiciilfitHs- L., Fauna Suec, 174(i, p. 306, No. 1270. 



1774 



181!) 

 1S41 



1S4,S 

 ] S.Vi 

 ISIil 

 1S6-2 

 1S7I) 

 1S74 

 l.Sl.^) 

 1 S6.S 

 18.S2 



Liiiiiix agrestis L,, Syst. Nat., ed. x., i., p. 6r)2. 



— }-ctirii/fi/ii.t Miiller, Venn. Hist., ii., p. 8, No. 2(17. 



— bilohafus For., Hist. Moll., p. 74, i.l. .'•), f. 11. 



— tiinirtffa GonUl, Im'ert. ?,l.assacim.^etts. ]t. 'A. 



— j>i(Uidn>i Schi'enk, L.and u. Sussw. Li\l.anils. 



— (Eiiliiwi.r) tifirr.it is lIor|.-Tan(l., ii., p. 22, pi. 2, f. 18-22, and ]>! 



— rrriiniffiiiiif: liouri;-., S]iicil. M.-il.ac, p. 30, pi. 13, f. 9. 



— Itrydciri Heyneniann, Jlal. 151., p 210. 



— iiorrriiiriix Westl., Fanna Moll. Suec, p. 22. 



— [Ar/riiiiimii.i) fi-df.vlirnkoi Koeli & Hi-vneniann, J.D.M.C!., p. 

 l.iiiK'rella ubiiijiui IJranl, Corp Paii.s, p. 118,' pi. 4, H'. 5, 6, 13, 14, 1.") 

 Agriolimax iKjri-.stis ^^.aInl, Skand. Liniac. , p. 69, ]>1. 3, f. 8. 



— panoriiiitdfiiiK Less. & Pol]., Monoi;. Liiiiac. Ital., p. .52, pi. 1, 



3, f. 1, 



l.-)3. 

 f. .5. 



ISTORY. — Aijrliilimdj' ((f/ir.^f/s (nijrestls, 

 inhabiting tielils) is one of the commonest 

 and most ilestnictive of our native species, 

 and was noticed and disci-iniiuated by some 

 of tlie earliest writers. 



It was first addeii to the Britisli lists by 

 Martin Lister in 1G74, who distiijguislied it 

 from otliei' kinds liy its smaller size and its 

 peculiar luilky-white mucus. 



It is the most highly organized of the 

 genus, and owing to its marvellous powers 

 of adaptatiou and its habit of frecpienting 

 cultivated land, it has been transported to 

 almost every laud where the white man has 

 established himself, thriving under its new 

 surroundings to the })rejmlice of the abori- 

 ginal species. 



According to i\lr. C. T. JMusson, L/iii<(.r 

 riiolestus Ilutton ami L. hgrdiiili Tate are 

 both referable to our ^\(/rii)/i/ii(i,r agri'siis, 

 while Luther considers L. I/i'i/i/ciii lleyne- 

 mann as another sj'nonym of the same 

 The Liiiut.r iri'hihmdl of Ileyiiemann has also been regarded as 

 inother form of this widely-disi)ersed slug. 



this species Prof T. 1). A. Cockercll, l'\Z.S., of Las (Vuces, New 



U.iS.A., has lieen associated in recognition (if his \alualile labours 



lucidatiiiii of the v.ariation ami aflinities of the jiresent aud other 



"^-^ Z^-^.Oc^c^'^. 



s])ei'ii's. 

 merely ; 



With 

 I\le.\ico, 

 ill the c 



SjICCICS. 



Diagnosis. — hl.\TEUNAl,LY, ^1. aijrr^fls may be distinguished from it.s 

 coiigeni'is by its ]iale ochi'eous or whitish lioily colour, sona>times s])otted or 

 lilodhcd with d.-irker pigment, but more espei'ially liy its milky-white slime. 



JNTWtNAl.LV, it is sliii.rply sci).'i,rateil li-oui all othi>r British slugs by the 

 bulky ]ieiiis-sliealh, and tin; variously digilale clavv-like liag(dlum at its 

 dist'il e.xtrcmily. 



