1 54 slugs. 



with many dark lines, somewhat resembling the veins 

 of a leaf. Under the mantle on the back is a small, 

 thin, six-sided shell. A line separates the foot from 

 the body. Its length is from an inch to two inches. 

 The specimen before me is from Portland, Oregon, 

 but it is also found down the coast into California. 



Limax Heivstoni, Cooper, Iyi'-max Hews'-ton-i. 



This sing is found in San Francisco, and a variety 

 which is perhaps the same exists in Portland and 

 other places. The body is two inches long or less, 

 narrow and high, black above, paler on the sides, and 

 whitish on the base of the foot. There is a minute 

 internal plate on the back. 



Limax montanus, Ingersoll, mon-ta'-nus, is a small, 

 bluish gray slug, about an inch long, found in Colo- 

 rado and Utah. 



Ariolimax niger, Cooper, A-ri-o-li'-max ni'-jer. 



The body is long and narrow, blunt in front, and 

 tapering but little behind. When crawling, the ani- 

 imal is some two inches in length, but when at rest, 

 as it may be found under old boards and in similar 

 places, it is so contracted that it is hardly one inch 

 long. 



Its color is quite dark, sometimes being nearly 

 black, especially on the upper surface of the body; 

 but I have found specimens which were much lighter, 

 almost an ashy gray. This species is common in 

 Alameda county, California, and in the neighboring 

 regions. 



Ariolimax Hemphilli, W. G. B., is a very slender, 

 flesh-colored slug, an inch or two long, found at Niles, 

 Alameda county, and it probably lives in the sur- 

 rounding region. 



