MALACOZOA. GASTEROPODA. PULMOJJRANCHIATA. 75 



genital organs united, and placed on the right side ante- 

 riorly near the larger tentaculum. 



Shell flat, nail-like, within the substance of the 

 mantle. 



Limax differs little from Arion. In the former, the 

 shield is concentrically striated, the pulmonary aperture 

 near the hind part of its border, the tail carinate ; in 

 the latter, the shield is granulated, the pulmonary aper- 

 ture near the fore part of its border, the tail with a large 

 mucous pore or cavity. 



The species feed on tender herbage, fruits, mush- 

 rooms, and vegetable substances in general. They are 

 most voracious after rain, or in the morning and even- 

 ing, remain concealed during the heat of the day, and 

 in long droughts suffer severely. In winter they are 

 torpid, and concealed under the ground, or in crevices. 



1. Limax clnereus. Spotted Grey Slug. 



Shield elongated, with fine concentric striae, cloak with nume- 

 rous parallel somewhat undulated ridges; the posterior third 

 of the body with a prominent acute undulated keel; upper 

 parts dusky-brown with five pale-brown longitudinal bands ; 

 surface of the foot with three longitudinal bands. 



The form is very elongated, flat beneath, very convex 

 above, laterally marginate. The upper tentacula very long, 

 tapering, granulated, a little enlarged at the end ; the lower 

 short, but similar. The shield is elongated, and marked with 

 fine concentric striae ; the rest of the upper surface with nu- 

 merous longitudinal parallel somewhat undulated ridges ; the 

 posterior third of the body with a thin projecting undulated 

 keel ; the tail rather pointed ; the surface of the foot with 

 three longitudinal bands, of which the two lateral are longi- 

 tudinally striated. The pulmonary aperture large, and near 

 the hind part of the shield. The head and tentacula are pale 

 yellowish-grey or reddish ; the shield pale-brown spotted 

 with black, the mantle dusky-brown, with five pale-brown 

 longitudinal bands, that continuous with the keel pale yel- 

 lowish-brown ; the lower surface pale-grey. Length six, se- 

 ven, or eight inches. 



Shell thin, flat, oblong, yellowish-white ; " fabae fere mag- 

 nitudine, multo tamen humilior, compressusque magis, modice 

 transparens, inaequalis, admodum glaber, parte altera pla- 



