LIMAX. 133 



keel, as well as marginal streaks on the shield, — although 

 he says it inhabits the beech, which character is more 

 applicable to L. arborum. Draparnaud doubted whether 

 his species was that of Midler because of this difference 

 in the habitat. It is the L. Sowerbii of Ferussac and 

 L. carinatus of Risso and Leach. The shell is the 

 Limacella unguiculus of Brard. 



The shield in this species is much smaller in proportion 

 to its body than in L. g agates ; and the respiratory orifice 

 is in the last-named species placed more towards the 

 middle of the shield-area. The colouring is also dif- 

 ferent. 



B. Shield concentrically wrinkled. 



3. L. fla'vus *, Linne. 



L.flavus, Linn. Syst. Nat. ed. x. i. p. 652; F. & H. iv. p. 19, pi. E. E. E. 

 f. 1. 



Body slightly contracted in front, rather broad in the middle, 

 and tapering gradually to a point behind, yellowish, speckled 

 with white and black so as to form a kind of network, covered 

 with coarse oval tubercles : head of a bluish colour : shield 

 oblong, larger and more rounded behind, elegantly grooved by 

 concentric and rather undulating Hues : tentacles bluish ; the 

 upper pair rather short, the lower ones remarkably so : foot 

 keeled towards the tail, margined with yellowish- white ; sole 

 milk-white : sli7ne yellow. L. 4. B. 0*75. 



Shell obliquely oval or quadrangular, rather concave on the 

 under side, thin, crystalhne and nacreous, with distinct lines 

 of growth : boss shghtly projecting behind : margin membra- 

 nous. L. 0-3. B. 0-125. 



Habitat : Cellars, wells, sculleries, and other damp 

 places, as well as in moist woods, everywhere. It is 

 also common in the northern and central parts of 

 Europe. 



* Yellow. 



