Lamarck's Genera of Shells. ^3§ 



3. Limax *. 

 Body oblong, naked, creeping, convex above, furnished an- 

 teriorly with a coriaceous, subrugose shield ; below, with a flat 

 longitudinal disk. Four retractile tentacula ; the two posterior 

 largest, with eyes at the summit. Branchial cavity under the 

 shield, at the anterior part of the body. Orifice for respira- 

 tion, and anus, at the right side of the shield ; that for genera- 

 tion in front, between the t.vo tentacula on the right. 



The limax is a land animal ; its skin is more or less rugose 

 and sulcated externally. It has much analogy with the helix 

 and bulimus, from which it differs principally in having no true 

 shell, and by its shield, and other essential peculiarities. It 

 creeps slowly, using its tentacula to feel the bodies that lie in 

 its way, and which it projects and retracts, in the same man- 

 ner that one turns the finger of a glove inside out. The ani- 

 mal is hermaphrodite and herbivorous, and frequents shady, 

 damp places. 



Type. Limax rtifus f- (Idem. Linn.) 



Body longitudinally sulcated, reddish above, white under- 

 neath. Infests gardens, &c. PI. VII. Fig. 127. 4 Species. 

 4. Testacella. 

 Body creeping, elongated, limaciform, furnished with a shell 

 at the posterior extremity. Four tentacula, the two largest 

 •with eyes at the summit. Orifice for respiration, and anus at 

 the posterior extremity ; that for generation under the largest 

 tentaculum, on the right side. 



Shell very small, external, subauriform ; apex slightly spi- 

 ral ; aperture very large, oval, obliquely effuse ; left margin 

 involute. 



The testacella is chiefly distinguished from the limax by the 

 very small shell which covers the posterior extremity of the 

 animal. It is, however, less allied to the limax than is the 

 parmacella, with respect to the branchial cavity, and the posi- 



vieri, and no specific description of the shell. Mr. Sowerby has adopted 

 the name calyculata, " on account of a little teslaceous ridge, which sur- 

 rounds the aperture of the spire, formin a little cup." PI. VII. Fig. 12G. 

 • A ilug. t Reddish. 



