LIMAX. 139 



Swedish naturalist is couched in the same terms as that 

 of his predecessor, Lister, who accurately distinguished 

 the present species from the black slug. It is the L. 

 antiquorum of Ferussac ; and the shell is the Limacella 

 parma of Brard. 



The L. brunneus of Bouchard-Chantereaux (F. & H. 

 iv. p. 20, pi. F. F. F. f. 4) is, according to Moquin-Tan- 

 don, a doubtful species ; and it is probably only one of 

 the numerous varieties of L, agrestis. It is rather local, 

 but appears to be widely distributed in this country, from 

 Zetland to Cornwall. In France its range extends 

 from Boulogne to the Pyrenees. In Dr. Gordon^s ex- 

 cellent contributions to the ^ Zoologist ^ it is stated that 

 this little slug, which is not uncommon in the Moray 

 Firth district, is the most lively and fearless of its tribe, 

 and that when disturbed, instead of contracting itself 

 into a lump, like most of its congeners, it makes bold 

 and repeated efforts to escape from the annoyance and 

 crawl away. The only essential diff"erence that I can 

 detect between it and L. agrestis is, that this slug is 

 smaller (scarcely an inch in length when crawling), and 

 of a uniform brown colour; and M. Bouchard-Chan- 

 tereaux admits that it is closely allied to the latter species. 

 The original L. brunneus of Draparnaud differs somewhat 

 in colour. The British species so called appears to be 

 the L. parvulus of Normand (Descr. Lim. Valencienues, 

 p. 8j, judging from his description. 



The L. tenellus of Forbes and Hanley (iv. p. 21, pi. 

 F. F. F. f. 3), which they refer to Miiller^s species of that 

 name, can scarcely be considered as more than provi- 

 sionally introduced into the list of British slugs. Moquin- 

 Tandon reckons this also to be a doubtful species. 

 Miiller describes his L. tenellus as being ten inches long 

 (although this is evidently a typographical error) ; and 



