106 PNEUMONOBRANCHIATA. 



eal spongy shell. We have specimens in the British 

 Museum, from Bath, presented by S. P. Pratt, Esq. 



It has a great geographical range, being found 

 equally in Ireland and Norway, and Italy and Spain. 

 They deposit their bluish eggs in a cluster in May, at 

 the roots of plants. . < 



They feed on dead and living vegetables, and some- 

 times, according to Mr. Power [Linn. Trans, ix. 323.), 

 on dead earth-worms. 



The country people consider the appearance of this 

 slug as an indication of approaching rain ; but this is 

 lather to be accounted for by the moisture of the 

 ground and of the plants. It is seldom, indeed, to be 

 observed abroad during dry weather, for this would 

 deprive the body of the moisture which is requisite 

 for its existence. (Bingley.) 



The inferior oesophageal ganglion, according to 

 the excellent observations of Mr. Nunneley, is " of a 

 square form ; and being slightly fissured, both trans- 

 versely and longitudinally, it apparently consists of 

 four ganglia united together : it also consists of two 

 laminae." 



Lister (Anat. t. 5. f. 1,2, 3.), Swammerdam (Bib 

 Nat. 1. 162. t. 4.), Cuvier (Annals Mus. Paris, vii., 

 and Mem. Mollus.), and more lately Mr. Nunneley 

 (Titans. Phil, and Lit. Soc. Leeds, i. 41.), have pub- 

 lished the anatomy of this animal. 



Dr. George Johnston has indicated a species under 

 the name of Arion subflavus, in his list of Berwick- 

 shire Mollusca, which he says inhabits woods and shady 

 places in that county. I cannot find any species de- 

 scribed under this name. Draparnaud describes a 

 Li max subfuscns, which Ferussac refers to this genus, 



