P m 
WORMS. TESTACEA. 68. Mytilus. 291 
Bilocularis, Shell blue ftriate with vaulted knobs and a white diffepi- 
Exustus, 
I 
Barbatus. 
e Edulis. 
" 
*» 
ment or partition. 
Spengler catal rais. tab. 6. fig. 5—85- 
Chemn. conch. 8. tab. 82, fig. 736. a,b. 737. 1—3. 
Inhabits Nicobar I[fands: ovate ; the anterior part flat, the mid- 
dle convex and gaping with an oyal foramen; the hind-part 
convex ; covered with green kin, 
Shell convex, one of the margins angular; the frontal ex- 
tremity crenate. 
Lifter conch. tab. 365, fig. 205. 
Chemn. conch. tab. 84. fig. 754. 
Inhabits American Ocean and Red $ea ; 1. % inch long: ferrugi- 
nous whitifh yellowifh or brown, fometimes blueifh: 5/;* 
with 4 or 5 lateral teeth. 
Shell fmoothith, ferruginous on the outfide, and bearded at 
the tip. 
Ginaun. adr. 2. pe 36. tab. 27. figs 16g. 
Gualt, tef. tab, 91. fig. H. 2? 
Chemn. conch. 8. tab. 84. fig. 749. 
Inhabits the Mediterranean and Noravay Seas; anhering to Litho- 
phytes: 2 of an inch long; under the fkin reddifh-ferruginous 
blue or whiuth, 
Shell fmoothiíh violet, the valves flightly recurved on the 
obtufe fide and fomewhat angular on the acute fide: 
beaks pointed. 
Pennant Brit. Zool. tab. 64. fig. 73. 
Lister conch. t. 362. f. 200; Barbut. t. 113 f. 6, 
Lifter an, Ang. tab. 4. pig. 28, ‘ 
Bonan. recr. 2. fig. 30. Muf. Kirch. 2. f. 29. 
Ginann, adr. 2. p. 36. tab. 23. fig. 168. - 
Baster op. fubf. 3. p. A01. f. 11. fo g—11. 
Argenville Zoom. t. 9. J. D,E;F.—— 
Knorr Vergn, V. tab. 4. fig. 6, Gand 4. t. 15. f. 1; 
Regenfe 621.7. f. 8. f. 41. f. 58. 0,1220231, 72. 
Chemn. conch, 8. t. 84. f. 750, 751: 755. 
2. Lifter Gonch, tab. 362. fig. 201. 
3» Lister conch. t. 362. fi 202. 
4. Lister conch, t. 363. f. 204. 
5. Gualt. test. t. 7. A. 
Inhabits European and Indian Seas ; generally z-3 inches long, but 
is much larger within the tropics and fmaller more northward; 
found in large beds, and geneaally adhering to other bodies 
by means of the long ‘filky beard: the fifh affords a rich food, 
but is often extremely noxious to many confitutions. 
Oo2z Shell 
