COCKERELL AND COLLINGE : CHECK-LIST OK SLUGS. 37 



Yar. //a7'csce/is, Cllge., given as a synonym o( sucdneiis, is 

 yellowish, with bluish sulci (Jide, CoUinge in litt.). The 

 latter feature might jwssibly separate it as a sub-variety.'"' 



377. A.fiisciis. Miiller's description is hardly sufficient to fix the 



exact race, as given by Pollonera. It seems that fuscus, 

 sens. Poll., cannot be separated as a species from subiiisais; 

 and if it is clear what Miiller intended, the name fuscus 

 must stand for the species, having priority.^" 



It may here be remarked that A. Juscatus. Fer., which has 

 been thought to be a form of juvenile A. ater, is placed by 

 Pollonera in the subfuscus group, though with a query. 



378. A. bavayi. This, nivalis and euthyvuanus, differ from sub- 



fuscus proper in the colour of the slime ; but although this 

 character has value in many cases, I do not ihink it can be 

 held to indicate distinct species in this group, as it is known 

 to be variable.'' 

 385. A. hortensis. The name coucavus, applied to the shell only, 

 is earlier ; but I do not see how it can be satisfactorily 

 identified. Turton (1831) makes Limaccllus concava, 

 Brard., identical with Liviaccllus varicgatus. The name 

 Jallax, Sterki, is also very uncertain in its application ; its 

 identity with A. bourguignati has been suggested. 

 385 a. vii. There is some difficulty here. I have not seen the 

 description of fasciaius, 1830, but very probably it was 

 merely a wrong identification of fnscia/us, Nilss., 1822, in 

 which case it has no standing. Pollonera cites limbaius 

 as equivalent to A. anihracius, Bgt., but I do not know 

 why, as Moquin's description precisely agrees with 

 A. hortensis, v. pelopliilus. In either case the name 

 limbaius, Moq., cannot be given up, being earlier than 

 pelopliilus or anthracius. 



The various forms of var. fasciatus are very similar, 

 differing in the degree of darkening, and the colour of the 

 sole and sides of foot. Thus dorsalis has only the dorsal 

 region black, fasciatus proper shows distinct black bands, 



'" I hase never described any such vars. TL^ni/escens or Jlavescens of W. snh/iiscus, and these 

 names should certainly not appear. In a letter to Mr. Cockerell I mentioned that I purposed 

 describing such, but he pointed out that Locard had named a var. ru/escens (sine descr.), so 

 I purposed grouping all red forms under ru/o/iiscus. Drp. ; the new var. latcritius, however, 

 turned up, and, being a much better marked one than any previously described, I grouped all red 

 f(;rms under it. I was not aware of the var. siiccmcus, Houill., when I used the lerm yfiiT'escetis. 

 All the yellpw forms mentioned by Mr. Cockerell should be removed from the red ones. — W. E.C. 



"' In all probabdity Midler's A./usciis is A. subfuscus, Drp. Signer Pollonera has very 

 kindly favoured me with examples, and I .igree with him that there is practically no difference in 

 the anatomy from Draparnaud's species. There is, however, a doubt about Miiller's species, and 

 so Draparnaud's name should, in my opinion, be retained. A. citriuus, Wst., is probably the 

 same thing. — W. E. C. 



' " The ne.\t step will probably be to .separate species according to whether they are found 

 on the north or the south side of the hedge ! — VV. E. C. 



