410 helicidj:. 



Limax campestris, Binney, Proc. Bost. Soc. 1841, 52; Bost. Journ. Nat. Hist. iv. 169 

 (1842); Terr. Moll. ii.4I, pi. 64, tig. 3. — Auams, Vermont Moll. 163 (1842). — De 

 Kay, N. Y. Moll. 22 (1843). — Leidy, Terr. Moll. U. S. i. 250, pi. 2, tig. 50 (1851) 

 an at. 



Color usually of various shades of amber, without spots or mark- 

 ings, sometimes blackisli ; head and eye-peduncles smoky ; body 



cylindrical, elongated, terminating in a very 



Pjo-. G71. ... 



short carina at its posterior extremity ; mantle 

 oval, fleshy, but little prominent, with fine, con- 

 centrical lines ; back covered with prominent 

 elongated tubercles and furrows ; foot narrow, 

 whitish ; respiratory foramen on the posterior dextral margin of the 

 mantle ; body covered with a thin, watery mucus. Length about 

 twenty-five millimetres. 



Inhabits all the New England, Middle, and Western States, and 

 is probably widely diffused through the country. 



The resemblances between some of the species of this genus are 

 so great that it is difficult to provide them with distinctive charac- 

 ters, and it is only by close comiiarison that their differences can be 

 seen. The present species, although considerably smaller, is nearly 

 allied to Limax agrestis. Its differential characters are as follows : 

 It is always much smaller, and at all ages possesses a peculiar gelat- 

 inous or semi-transparent consistency. The tuljerosities of the sur- 

 face are more prominent in proportion to their size, are not flattened 

 or plate-like, and are not separated by darker colored anastomosing 

 lines, the intervening furrows being of the same color as the gen- 

 eral surface. It does not secrete a milky mucus at every part of 

 the surface when touched. Like that species, it is active in its mo- 

 tions, and suspends itself by a thread of mucus. 



This species appears to be common to all the northern parts of 

 the United States. It is found under decaying wood in the forests 

 and in open pastures, and under stones at roadsides. From its 

 wide distribution, it would seem to be indigenous. 



Its testaceous rudiment is minute and delicate in proportion to the 

 small size of the animal. 



Limax flavus. 



Color brownish, with oblong-oval uncolored spots ; body cylindrical, elongated, 

 terminating with a short prominent keel; mantle oval, rounded at both ends, with 

 rounded spots ; base of foot sallow-white. 



Limax flnvvs, LiNN,?i;us, Syst. Nat. [x.] 1758, i. 652 (not MItlleti, 1774). — Binney, 

 Bost. Jonrn. Nat. Hist. iv. 164 (1842). — Db Kay, N. Y. Moll. 21, pi. 1, fig. 5 

 (1843). — Gray, Pfeiffeh, Keeve, &c. 



