30 LIMACID^E. 



country ; but in the city it is sometimes two inches in 

 length, 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 observed, to a 

 limited range in the neighborhood of Boston alone, and 

 its numbers do not appear to be large. There can be no 

 doubt, we think, of its being an introduced species. 



ARION FOLJOLATUS, GOULD. 

 PLATE, LXVI. FIGURE, 2. 



A. corpore depresso, fulvo, sulcis nigricantibus oblique 

 reticulato, areolis inclusis foliosis ; clypeo prselongo, Isevi, 

 fulvo, concentrice fusco notato ; apertura communi ante-me- 

 diani ; tentaculis parvis, brevibus. 



SYNONYMS AND REFERENCES. 



Arion foliolatiis, GOULD, MS., Mollusca of the U. S. Exploring Expedition. 



Color a reddish fawn, coarsely and obliquely retic- 

 ulated with slate-colored lines forming areolse, which are 

 indented at the sides, when viewed by a magnifier, so as 

 to resemble leaflets ; the cuirass is concentrically mottled 

 with slate color, and the projecting border of the foot is 

 also obliquely lineated. The body is rather depressed, 

 nearly uniform throughout, and somewhat truncated at 

 the tip, exhibiting a conspicuous pit, which was probably 

 occupied by a mucous gland. The shield is very long, 

 smooth, and has the respiratory orifice very small, situa- 



