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2. Limax maximus, Linn. 



Plate 16, figure 2. 

 This very large French Snail has been found recently in cel- 

 lars in Philadelphia, in such numbers as to warrant the belief 

 that it has become a permanent addition to our mollusca. The 

 figure is from a living specimen. 



3. Limax agrestis, MUUer. 



Plate 17, figures 14, 15, 16. 



Much smaller than the preceding ; color varying from white 

 through all shades of yellowish and grayish to brown or black, 

 with or without small black dots, the mantle sometimes mottled 

 with lighter color, white beneath. Upper surface somewhat ru- 

 gose. 



Length 1 to 2 inches. 



Cities on the coast and their vicinity. (From Europe). 



4. Limax campestris, Binney. 



Plate 17, figures 11, 12, 13. 



Cylindrical, elongated, thin ; color black, lead or brownish, 

 without spots ; mantle finely concentrically striated, back prom- 

 inently tuberculated. 



Length one inch. 



Northern and Western States. Indigenous. 



5. Limax Columbianus, Gould. 



Plate 16, figure 1. 



Thick, carinated and obtusely pointed behind ; foot wide, 

 margining the body and furbelowed, with transverse oblique 

 striae, body longitudinally corrugated, mantle finely granulated; 

 color dark greenish yellow, sometimes with large purplish black 

 blotches. 



Length five inches. 



Neighborhood of Puget's Sound, Oregon. 



