24 limacid^;. 



Leach had noticed it, and described it under the name 

 of carinatus, but no published account or figure, except 

 that of Draparnaud preceded Ferussac's, whose name 

 besides is best. 



L. gagates, Draparnaud. 



Back carinated throughout, shield granulated ; dark lead 

 colour, with pale sides. 



Plate D. D. D. fig. 3. 



Limaw gagates, Draparnaud, Hist. p. 122, pi. 9, f. 1, 2. — Ferussac, Hist, 

 p. 75, pi. 6, f. 1, 2. — Clarke, Ann. Nat. Hist. — Brown, 111. 

 Brit. Conch, p. 56, pi. 58, f. 4, 5. 



The general colour of this curious slug is lead-grey, 

 sometimes very dark, occasionally slightly greenish, be- 

 coming lighter towards the sides, and near the margin 

 of the foot almost white. When crawling, it is of an 

 elongated lanceolate shape, very tapering towards the 

 tail. When at rest, it is contracted into a semicircle, 

 the sharp-edged back gradually rising from the large 

 shield. The head is rather large, bluish-grey, with 

 darker tentacles. The shield or disk is oblong, obtuse, 

 and subtruncated at both extremities, granulated on the 

 surface, and bearing the respiratory orifice nearer the 

 centre than it is placed in Sowerbii. The colour of the 

 shield is often darker than that of the body. The back 

 is strongly and sharply carinated ; its surface is covered 

 with oblong tubercular wrinkles, each of which is depressed 

 and granulated ; they become smoother and larger to- 

 wards the sides. The margin of the foot is smooth and, 

 as well as the sole, white. The mucus is colourless. 

 The shell is small in proportion to the bulk of the shield, 

 unguiform, elongated, oval, thick, and irregularly convex, 



