/ 
412 CLASS IX. ORDER tf. 
Doris, (sea-lemon,) body creeping, oblong, and 
flat beneath: mouth placed below on the fore- 
part; vent behind on the back, surrounded by a 
fringe ; feelers 2 to 4, seated on the upper part of 
the body in front and retractile within their proper 
receptacle. A 
Triton, (water salamander,) body oblong ; 
mouth with an involute spiral proboscis ; tentacu- 
lz or arms twelve, six on each side, divided near- 
ly to the base, the hind ones cheliferous. 
Trtuys, body detatched, rather cblong, fleshy, 
without peduncles ; mouth with a terminal cylind- 
vic proboscis under an expanded membrane or lip ; 
apertures two on the left side of the neck. In sea. 
Lapuisia, (sea-hare,) body creepivg, covered 
with reflected membranes, with a membranaceous 
shield on the back, covering the lungs ; aperture 
placed on the right side ; vent above the extremi- 
ty of the back ; feelers four, resembling ears. In 
sea. 
ScyLLaEA, body compressed and grooved along 
the back ; mouth consisting of a terminal, toothless 
aperture ; tentacula or arms three each side, and 
placed beneath. In sea. | 
Limax, (slug, smooth snail,) body oblong, creep- 
ing, with a fleshy kind of shield above, and a lon- 
gitudinal flat dish beneath; aperture placed on 
the right side within the shield ; feelers four, si- 
tuated above the mouth, with an eye at the tip of 
each of the larger ones. In water, moist places, 
and on common soil, 
Sapa, bedy loose, nayant, gelatinous, tubular, 
and open at each extremity ; intestine placed oh.~ 
liquely. In sea, ° 
