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MONOGRAPH OF BRITISH LAND AND FRESHWATER MOLLUSCA. rs) 
Limax cinereo-niger Wolf. 
1774 Limax cinereus varr. a and € Miiller, Verm. Hist., ii., pp. 5 and 7. 
1789 — ater Razoumowsky, Hist. Nat. Jorat, p. 266. 
1803 — cinereo-niger Wolf, in Sturm’s Deutsch. Fauna, fase. 1. 
1804 —_ geographicus Renier, Prodr. Classe d. Vermi Adriatico. 
1819 — antiquorwm Feér., Hist. Moll., p. 68, pl. iv., £. 1, pl. 8A, f. 1 & pl. 8p, f. 2. 
1821 — alpinus Fér., Tabl. Syst., p. 21, pl. 4A, ff. 5-7. 
1822, — _ vittipes Bonelli, Ms., Mus. Taurin. 
1836 — maurus Held, in Isis, p. 271. 
1851 — bilobatus Ray & Drouet, Moll. Champagne, p. 16. 
1852 — lineatuws Dumont & Mortillet, Hist. Moll. Savoie, p: 192! 
1854 — dacampi Menegazzi, Malac. Veronese, p. 63, pl. 1, ff. 1-4. 
1855 = — corsicus Moquin-Tandon, Hist. Moll. France, ii., Ds 205 pleds fis 1O=0s: 
1855 — claravallensis Drouet, t. Moquin-Tandon, op. cit., p. 28. 
1861 — doriw Bourg., Rev. et Mag. Zool., p. 256, Dl Satie Tene 
1862. — engadinensis Heyn., Mal. BL, p. 204. 
1862, — _ ftransilvanica Heyn., Mal. BL., p. 216. 
1863, — nubigenus Bourg., Spic. Mal., p. 20. 
1864 — erythrus Bourg., Mal. Grande Chartreuse, Bp: 3l5 pl. 2, ie 128: 
1867  — niger Malzine, Faune Mal. Belgique. 
1871 — montanus Leydig, Verhandl. Wurtt., p. 210. 
1873 — _ bielzii Seibert, Mal. BI., p. 195. 
1881 — cinereus B intermedia. Breviere, J. de Conch., p. 314. 
1894 — hedleyi Collinge, Journ. of Mal., iii., pp. 51, 52, and iv., pp. 4, 5, 1895. 
1849 Arion lineatus Dumont, Bull. Soc. Hist. Nat. Savoie, p. 64. 
1868 Hulimax cinereo-niger Malm, Skand. Limac., p. 57, pl. 5, f& 12, 13. 
1876 Limacella cinereo-niger Jousseaume, Bull. Soc. Zool. France, p. 99. 
ISTORY.—Limav cinereo-niger (cinereo- 
niger, ashy-black), is one of the largest 
and most brilliantly coloured of the Euro- 
pean slugs, if the allocation by Simroth of 
the gorgeous Italian forms to this species be 
correct, the colouration of these magnifi- 
cent Limaces ranging from black to white, 
through vivid red, bright yellow, grey or 
brown, and in size far exceeding the largest 
L. maximus. Inthe cool and moist climate 
of the British Isles, however, this species is 
unusually constant im its colouring, and 
offers little variation from a more or less 
uniformly dark pigmentation. 
With this, the finest species of the group, 
we associate Herr D. F. Heynemann, of 
Frankfort, whose services to the cause of 
Timacology can scarcely be overestimated, 
and in recognition of whose labours Malm 
constituted the group Heynemannia to em- 
brace the present species and its close allies. 
Although, in common with Dr. Simroth 
and many other malacologists, Herr Heynemann regards Limax cinereo- 
niger as only a form of Limax maximus, “changed by food, climate, or 
anything else,” it is possible that this belief is in many cases based upon 
a pre-conceived opinion, which an accurate appreciation of the undoubted 
differences would probably modify, as, though both species have certainly 
sprung from the same stemma, c/nereo-niger is undeniably the more ancient 
offshoot, exhibiting such an assemblage of divergent characters as seems 
conclusively to show that it has finally parted company with Z. maximus. 
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