ARTON. 217 



M. Fernssac and M. Lamarck, and so it is, as it exists in the 

 country; but in the city it is sometimes two inches in leno-th, 

 when not fully extended, and of a corresponding bulk. The dark 

 lines are most strongly marked in the large variety. The small 

 variety is more delicate in its markings, and has a tinge of yellow- 

 on the foot. It is still restricted in its distribution, so far as 

 known, to the neighborhood of Boston alone. 



Subgenus LOCHEA, Moq.-Tand. 



Shield covering small, isolated, unequal, calcareous granula- 

 tions 



Al'ion foliolatlis, Gould. — Color a reddish- fawn, coarsely and 

 obliquely reticulated with slate-colored lines forming areolrs, which are 

 indented at the sides, when viewed by a magnifier, so as to resemble leaf- 

 lets ; the cuirass is concentrically mottled with slate-color, and the pro- 

 jecting border of the foot is also obliquely lineated. The body is rather 



Fig. 495. 



Avion fiiliolatus. 



depressed, nearly uniform throughout, and somewhat truncated at the 

 tip, exhibiting a conspicuous pit, which was probably occupied by a 

 mucus gland. The shield is very long, smooth, and has the respiratory 

 orifice very small, situated a little in front of the middle. The eye- 

 peduncles are small and short. Length 85 mill. 



Arion foliolatus, Gould, Moll. U. S. Espl. Exped. 2, f. 2, a, b C18r.2).— 

 BixNEY, Terr. Moll. II, 30, pi. Ixvi, f. 3 (1851).— W. G. Bikxev, 

 Terr. Moll. IV, 6. 



Jaw — ? 



Lingual membrane — ? 



Found at Discovery Harbor, Pugct Sound.* 



' It is erroneously quoted from Boston, by Gratelonp, Distr. Geog. des 

 Limaciens, p. 8. 



