~GASTEROPODA. LIMACIDZ. 51 
extends anteriorly beyond the middle of the back ; but in our 
L. carinatus it touches the dise of the thorax, Pl. VIII. fig. 3. 
The shell is for the most part single ; but two, and sometimes 
three, shells are found lying over each other. 
The lateral aperture contains the orifices of the respiratory 
sac aud rectum, which are very near to each other. The aper- 
ture for the organs of generation is placed near the right supe- 
rior tentaculum behind. 
1. Limax ANTIQUORUM. 
L. badius, fuscus, cinereus aut niger, seepius longitudinaliter 
fasciatus, carina dorsali dentaté aut undulata, capite tenta- 
culisque rufescente-badiis. 
Limax Antiquorum, Féruss. H. des M. i. 68. pl. 4. 
Limax cinereus, Lister, Phil. Trans. ix. 96. t. 14. 
Limax maximus, Linn. Syst. Nat. xii. i. 1081; Penn. Brit. 
Zool. iv. 41. 
Limax cinereus, Mill. Hist. Verm. v. 202. var. a.et 8; Drap. 
HI. des M.104; Sturm. Deut. Fn. Wurm. 2 heft. 
Limax cinereo-niger, Sturm. Deut. Fn. Wurm. 1 heft. 
Testa tenuis, concava, Féruss. Hist. Nat. des Moll. pl. 4. 
fig. 4. 
Habitat in cavernis, cellariis. 
Colore valdé variat. Thorax concolor, aut pulcherrimé ma- 
culatus. Dorsum et latera quandoque nigra aut fusca, nec raro 
immaculata, cinerea, badia aut brunnea, seepé fasciis vel macu- 
lis in lineis longitudinalibus digestis, pulcherrimé ornatis. 
Corpus valdé elongatum. Caput lined longitudinali nigra 
utrinque canaliculataé, fasciaéque obscura utrinque a tentacu- 
lorum basi ad thoracem ducté. Tentacula elongata. Dorsum 
elongato-sculptum ; sculptura erosa, anticé et postict acumi- 
nata. Carina ad medium dorsi, vel ultra producta, serrata, 
dentata aut undulata. Pes albidus, in nonnullis luteo tinctus. 
Body chestnut, fuscous, cinereous, or sooty-black, generally 
banded longitudinally, the dorsal carina dentated or undulated, 
head and tentacula reddish chestnut. 
Body much elongated. Head with a longitudinal black line, 
haying a groove on each side, and an obscure band on each side 
D2 
