WORMS. MOLLUSCA. 49. Medus. T 
Body flattifh, a little convex above, the border membranaceous 
and fringed with white fafciculi: beneath is a villous nucleus, 
which in the leffer ones is 8-angled, and in the larger ones 
10-angled, 
2 etrafyla. Hemifphzrical, without tentacula; furnifhed with 4 mar- 
ginal tubes united into a prifm, 
Forsk fn, Egypt. Arab. 5. 106, n. 11. 
Inhabits the Red Sea ; about a fpan and a half acrofs. 
Body hyaline, rather rigid: £u5es of the margin linear, 3 inches 
long, ftraight and flat, ; 
; 4 
O&ofiyla. Hemifphzrical, without marginal tentacula: beneath a 
i 4-folded column with 8 many-cleft lobes at the tip; 
and r6 lateral appendages. 
Inhabits the Red Sea. Forsk. fn, 42g. Arab. p, 106. n. 18. 
Body blueifh-hyaline, a foot in diameter; the column beneath 
about an inch and a half long. 
Andromeda Hemifphzrical, without marginal arms: beneath 8 round 
ramified foliaceous arms. 
Inhabits the Red Sea, Shaw Net. Mifcel. tab. 259. 
Body tranfparent, pale yellowith-brown or blueifh, with white 
rays and entire margin; in the middle a {mall black crofs: 
arms white, and a little thicker than a goofe quill at tne in- 
fertion. 
Corona. Hemifphzrical, without marginal tentacula; beneath 8 
cultrate arms, toothed each fide below. 
Inhabits the Red Sea. — Fors. fu. 4ig. Arab. p. 107. n. 20. 
Body reddifh-hyaline, about 4 inches acrofs, with a blue crofsin 
the centre: arms beneath broad, and 2-lobed at the tip. 
Pera. — Hemifpharical, hyaline, with an opake white ring within 
4. times interrupted: marginal tentacula o. 
Inhabits the Mediterranean. — Forsk. fa, Eg, crab. p. YOT. n. 21, 
Bedy about 2 inches wide, with a very prominent margin: arms 
4, fublanceolate, about an inch long, and undulate at the 
raargin, 
Cephea, Hemifphzrical, tuberculate, reddifh-brown: beneath $ 
arms villous at their extremities, and 9 very long 
filiform tentacula. i; 
Inhabits the Red Sea. — Sbaav Nat. Mifcell. tab. 224; 
Body pellucid, with 8 paler rays: erm; blucifh with black ex- 
tremittes; feufacula pointed. 
Pro- 
