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Syn. Limax Auctt. antiqu. pr. p. — Arion Ferussac, 

 1819. 



Halniat in silvis frondosis, humidis et urabrosis, sub folia 

 putrida, iii agaricis et truucis putrescentibus. 



1. A. impericorum Fer. (1819): corpus animalis maturi uni- 

 color, grosse squamosum, magnum, solea aequali latitudine, antice 

 et postice feque rotundata; long. ad 130 — 150, lat. 18 — 25 nim. 



(Europa.) Graniilae calcarere sub clypeo testse loco: uncinus radulge 

 medius cuspide utrinque unituberculato, uncini marginales apice se- 

 cundario externo; sudor non vel leviter coloratus. Sunt prsesertim tres 

 colores sub quibus hoc animal demum occurrit : 1. oier Lin. (1758), cor- 

 pore aterrimo, subtus pallido, limbo sfepe rufo hneis transversis stri- 

 ato (prajs. in Europa boreah): 2. rufus Moq.-Tand. (1855), corpore 

 miniato vel coccineo, hmbo striato, subtus palHdo (prees. in Europa 

 mei'idionah): 3. albus Lin. (1767), corpore toto albo (vel flavido, inter- 

 dum tentacuHs et Hmbo striato coloraHs). Multi sunt inter illas tran- 

 citi colorum et variationes (ex. gr. fulvus, obscure rufus, fusco-casta- 

 neus et ahse), permultae autem colnre formoe animahum crescentium 

 a pullo semper albido vel pallide virescente, omues fere ab auctoribus 

 ut species descriptse, quarum sequentes principes : A, melanocephalus 

 F. Big., 1822 (L. flavus MiiH. ?, Nilss., A. flavus Fer., Lehm.), albido- 

 virescens v. palHde thalassinus, capite et tentacnUa airis ; A. succineus 

 Miin. 1774, rufo-fuscus v. succini coloris, tentacuHs nigris: A. cam- 

 pestris Mab.- 1868, aurantiacus, Hmbo non striato flavido, punctis cre- 

 bris aurantiacis ornato (GaH.); A. hibernus Mab. 1868, obscure pur- 

 pureus, solea albida, Hmbo transverse brunneo-hneolato (GaH.); .4. </««- 

 defroyi Mab. 1870, dorso griseo-rufescens v. flavidus, solea medio pal- 

 Hda, hmbo griseo atro-Hneato (GaH.); J.. ?;M-esce«sMin. 1854, virescens, 

 fasciis duabus lateralibus flavido-aurantiacis {QaW.y, A.brunneuslje\\m. 

 1862, caffeatus vel ferrugineus, dorso obscuriore (Germ. bor. et Bohem.) 

 A. olivaceus Schm. 1856, ohvaceo-brunneus, obscurius fasciatus, subtus 

 cinereus, sudore hiteo (Germ. et Transsilv.); A. bicolor Broeck 1870, 

 albido-flavidus, utrinque fascia nigra (Belgia). Omnes minores vel 

 parvi (puhi). AHae formae magnitudine animah maturo eequales ut 

 species descript8e,Mnter quas : A. sulcaitis Moreh 1845, omnino niger, 

 margine radiato, castaneo, long. 15—16 Cm. (Lusitania) ; A. servaini- 

 anus Mab. 1870, corpus rufum, postice attenuatum obtusum, squamis 

 vix elevatis, corpore contracto rectangiilaribus, apud exempL in spi- 

 ritu conservata omnino deplanatis (Gahia). — Perraro occurrunt (in 

 Belgia et Germ. ad Eberbach) specimina juniora hujus speciei /a*cm<a 

 (corpore fascia obscura utrinque ornato, clypeo lyriforme signato), in 

 quibus fascite cum aetate omnino exstinguuntur (teste clar. \\. Sei- 

 bert.) 



2. A. subfuscus Drp. (1805): corpus animaHs robustum, utrin- 

 que fascia continua obscura, magis cylindraceum, dorso postice 

 subcarinatum, magnitudine mediocre, tenuiter squamosura; clypeus 



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