LIMAX. 65 



great. It begins to lay its eggs early in tbe spring, and con- 

 tiuues, with intervals, until checked by the cold of approaching 

 winter. The last deposit of them often remains in the soil until 

 the succeeding spring, when they are hatched with the first gene- 

 ration of the year. The eggs are semi-transparent, and nearly 

 globular. They produce young in about twenty days after they 

 have been deposited. 



M. Bouchard-Chantereau.x has observed them to deposit eggs 

 in sixty-six days after their own birth, and to attain their full 

 size in eighty-two days. 



This species varies very much in color, and the descriptions by 

 different authors being drawn principally from it, differ greatly 

 from each other ; but whatever may be the color, the peculiar 

 character of the furrow^s and the tubercles remains constant. In 

 a state of contraction, the back is arched, the head is entirely 

 withdrawn under the mantle, the glands of the skin are very 

 prominent, making the surface appear rough, the carina is more 

 apparent, and the posterior extremity, being a little turned to 

 one side, appears to be oblique. It is described by some authors 

 as constantly oblique, but the obliquity disappearo when the 

 animal is fully extended. When in motion, the head extends 

 considerably beyond the mantle, and there is an interval between 

 its margin, and the base of the superior tentacle, equal to the 

 length of the tentacles. The mantle adheres to the body by its 

 posterior central portion, and it is in this part of it that is found 

 imbedded the testaceous rudiment, or shell. This is oval, curved 

 above, very thin and delicate, having a transparent epidermis. 

 At its posterior part there is a slight apical prominence, and the 

 appearance of indistinct concentric lines of growth. 



There is no considerable variation in the species 

 except in regard to color, which varies almost in- ^'S- ^^'^- 



finitely. ^^^^^^ 



Jaw (according to Moquin-Tandon) arcuate, ends 



and median projection blunt; vertical middle carina umax a^restis. 



light horn-color. 



The figure of the lingual dentition of this species given by 



Morse (Portland Jouru. I), was drawn from a species of Avion. 



Itimax campestris, Binney. — Color usually of various shades of 

 amber, without spots or markings, sometimes blackish ; head aud eye- 

 5 July, 1868. 



