TEBENNOPIIORUS. 459 



provided with a deep furrow or canal running from the orifice to 

 the ed<>e of tlie mantle below it. 



It is very inactive and sluggish in all its motions. It inliabits for- 

 ests, under the baric, and in the interior of the decayed trunks of 

 fallen trees, among which it is particularly partial to the basswood, 

 Tilia Americana. 



The variations from the common coloring arc numerous. Wo 

 have already observed the following varieties : — 



a. Whitisli, without clouded spots, tending to grayish. 



b. Whitish, slightly clouded longitudinally. 



c. Irregularly clouded with brownish, Avithout any tendency to 

 lono-itudinal arranaement. 



d. With tiiree distinct rows of large clouded spots. 



e. With great numbers of fmc black spots. 



/. Gray, with a line of minute black dots along each side. 



g;. Blackish-gray, with black lines along each side, and an indis- 

 tinct line down the middle of the back. 



The appearance of the surface of the mantle is constantly chang- 

 ing, from the play of light on its lubricated eye-peduncles, tentacles, 

 and furrows, which are in almost ceaseless motion. 



There can be no doubt that this is the animal originally described 

 by Bosc under the name of Limax CaroUnensis^ though his descrip- 

 tion is so imperfect that it can only be recognized by the arrangement 

 of colors which belongs to it. Ilis original drawing, engraved in 

 Fcrussac's work, is a tolerably accurate representation of one of its 

 varieties. He makes no mention of the mantle, and it does not ap- 

 pear in the figure. 



An individual of this species kept in confinement, deposited about 

 thirty eggs, June 20, 1843 ; on the 10th July the young made their 

 way out of tlic shell. The eggs were semi-transparent, oval, about 

 one fifth of an inch in the greatest diameter. The young when ex- 

 cluded were more than a fourth of an inch long, semi-transparent and 

 gelatinous ; eye-peduncles and tentacles bluish-black at base, black 

 at tip, the latter very minute and hardly visible. Body broad ; back 

 whitish, with two distinct rows of minute black dots down the mid- 

 dle, and other scattering spots on the sides. No perceptible furrow 

 between the mantle and body. They increased very rapidly in size, 

 and in a few davs were four times as laro-e as wlicn hatched. 



Jaw short, Ijroad, arched, liglit horn colored, anterior surface con- 

 vex, but having no distinct vertical carina on the centre, its most 

 anterior point. Concave margin irregular, without a distinct, acuto 



