WORMS. MOLLUSCA. 12. Onchidium. 23. Laplifia. 75 



Found early in the fpring in hollows of woods, filled with dry 

 leaves : 10 lines long : Jhield whitifh with a yellowifh call. 



*Unceo/a- Linear-lanceolate and very fharp at each end ; the margin 

 tn s% furrounded with a membranaceous border : tentacula 



or feelers o. 

 IP all. Spicil Zool. IO, p. 19, tab. I, fig> II. 

 found on the coaft of Cornwall: of a very uncertain Genus. 



22. ONCHIDIUM, Body oblong, creeping; 

 flat beneath : mouth placed before : feel- 

 ers 2, fituate above the mouth : arms 2, 

 at the fides of the head : vent behind, 

 and placed beneath. 



Tjpte % Onch. 



<Iranfa&. Linn, Sof. v. p. 132, tab. 5, fig, I — 3. 



Inhabits Bengal, on the leaves of the Typha elephaimna : about 

 an inch long and f of an inch broad, but linear and longer 

 when creeping. In appearance it very much refembles a Li- 

 max, but differs principally in wanting the ftiield and lateral 

 pore, and in being furnimed with a vent behind. 

 . Body above convex, afh-colour, and covered with irregular glan- 

 dular tubercles ; beneath flat and fmooth; £<W yellowifh, 

 fmall and placed beneath, which when the animal is in mo- 

 tion is perpetually changing its form and iize, arid drawn 

 in when at reft : mouth placed lengthways and continually va- 

 rying its fhape from circular to linear : feelers retractile, re- 

 fernbling thofe of the Slug, and apparently tipt with eyes : 

 ' arms dilatable, fohd, comprefTed and fomewhat palmate when 

 fully expanded. 



23. LAPLISIA. Body creeping, covered with 



reflected membranes, with a membrana- 

 ceous ihield on the back covering the 

 lungs: aperture placed on the right fide: 

 vent above the extremity of the back : 

 feelers 4, refembling ears. Sea-hare, 



*Depilans. Body pale lead-colour, immaculate. 

 Pennant Brit. Zool. iv. tab. z I , fig. z I . 

 Barbufs Genera of Worms* p 3 32, tab. 3, fig* 5, 6. 

 Seba Muf. 3. tab, 1, fig. 8, 9. 



K 2 Inhabits 



