i8 M<ii)riijoi' OKI. AM). M.-N. Kl. 



weather. This variety is especially frcquenl in the North of l-jirr)pe and 

 in the mountains of Central Kiirope. 



Var. castanea Dum. d Mokt., Cat. Moll. .Savoie, 1857, p. 6. 



Usually (laik chocolate-coloured, in some cases of a ])aler brown. 



It is rare in Norway, h(in,i; mentir)ncd by Joachim P'kiklk (1853) 

 willioiit iiulicalioii of localit\-, and lai( i" on iound by my.self at Bale.strand 

 (Sogn) and at iireviksstrandcn ( Komsdalen). 



\'ar. rula [.., Sv'st nat., 1758. cd. 10, \-ol. i, [). 652. 



I^iiiuix ) II fits I,., op. cit. 



Colour pale or dark red. 



hi Norway this xariety has onl\' been found at Sverresborg in Bergen, 

 but, as mentioned by Joachim Friele (1853), it was probably introduced 

 into the park on trees and bushes. It appears to have remained there 

 for a considerable time, as Kyrre Grepp told me that it most probably 

 was this variety which he found at Sverresborg about 1890. 



The variety is especially characteristic of the lower parts of Central 

 Europe. 



Var. alba L., Syst. Nat., ed. 12, 1767, p. 1081, No. 2. 



LiiiKi.v albus L., op. cit. 



ArioH albus Fér., Hist, des Moll., 1819, p. 64, pi II, fig. 3. 



Arioii albus var. simplex Moquin-Tandon, Hist. Moll. France, 1855, vol. 2, p. 12. 



Ario>i albus var. iiiargiuatus Moquin-Tandon, op. cit. 



Arion albus var. oculatiis Moquin-Tandon, op. cit. 



Arion albus var. clegans Moquin-Tandon, op. cit. 



Of a white colour, but as the head and foot-fringe may be either black, 

 white or yellow several sub-varieties are distinguishable. 



hi Norway the variety is dispersed throughout the territory of distribu- 

 tion of the species {indc Appendix to maps I. It has been asserted that it 

 chiefly occurs where the ground abounds in lime, but I doubt the truth of 

 this statement. The following sub-varieties have been met with in Norway: 



Sub. var. sii//p/cx. Of a uniform nhite colour. 

 „ „ niargiuaUi. White with jtUow foot-fringe. 

 „ „ elegans. White with orange head and foot-fringe. 

 „ „ ocidata. White with black tentacles. 



Var. cinereo-nebulosa Jensen. 



Arioti atcr L. var. cinoeo-ncbolosus Jensen, Indberetning, 1872, p. 73. 



Anterior half of the shield, the sides of the bod\' and the whole foot- 

 sole with patches of dark gre\'. Th^_ back ierior part of the 

 shield whitish, with transition o*" uniform c. ...k ^. 'jument in the 

 sides and the anterior half :f the shield. The foot-fringe orange. 



This peculiar variety has only been found b}- O. S. Jensen in the neigh- 

 bourhood of Tvedestrand, and its I'elation to the others is doubtful ; Taylor 

 placed it under var. alba. The original description runs as follows : 



