266 
WORMS. TESTACEA. 66. Oftrea. 
Pufi}, Shell equivalve with about 40 filiform rays, the furfacco^'" 
irregular or diflorted. 
Doncn)aih Brit Shells, i. tab. 34. 
Pennant Brit. Zool. iv. tab. bl.fig. 6j. 
Da Casta Brit. Conch, tab. 10. fig. 3, 6. 
Lifter an. Ang. p. i86. tab. t^.fg 31. 
Lister conch, tab. \%\.ftg. 18. r. 189 f. z^i. 
Bonan. rtcr, and Muf. Kirch, z. fig. I J. 
Knotr. P'ergn. 4. tab. \ z f,g. 2 and 5- 1. 13./. 2. 
Ckemn. conch. 7 tab. 67 fg 635, 636. 
Inhaoits European Atlantic and American Seas. 
Shell gene.'ally tinall and a little longer thaa it is broad, I®’’! ( 
times with a fmootli furface, but moftly with an irreg'^hj 
waved furface as if deformed by an accident ; very vafi^ , ^ 
in its colours and marks, but commonly fine red: one of ^ 
tars is very fmall, the other fliarply fpined beneath. 
*Obfoleta. Shell fmooth equivalve femitranfparent, dark purple, 
8 fubofelete rays. 
Donovan's Brit. Shells, i. tab. \~ftg. 2. 
Pennant Brit. Zool. iv. tab. 61, fig. 66. 
Inhabits Britijh Coafis, | of an inch long. ^,D 
Shell ih\n, the valves equal and ftiallow, within fmooth and br®'^^ 
with a pearly glofs; outfide dull purplilh-brown with 
merous longitudinal ftria: between the rays; ears very une8“ 
wrinkled. 
' Ltevis. Shell very fmooth ; ears ribbed. 
Inhabits Angkfea. Brit. Zool. iv. p. loz. n, 67. 
* Glabra. Ears nearly or quite equal: fliell equivalve with 
fmooth flattiih rays ; the inlide w'ith elevated doub^^ 
ft rite. 
Bonann. Muf. Kirch, and recr. z. fig. 1 1 — 13. 
Gualt. test. tab. 73. H. tab. 74. A — D. F. Z. 
Klein oftr. tab. c). fig. 29. Seba. Muf ^.jab. ^y.fig. 16. 
Pegenf. conch. 1. tab. 1. fig. 10. r. 3 f. 30, 31. 
Knorr Vergil. I. tab. 8. fig. 5, 2. t. \0.f. 2. 
Born Muf. Ctes. Vinci, tell. tab. S.fig. 4. 
Chemn. conch. 7. tab. Sy.fig. 638 — 645. 
Inhabits European and American Seas : nearly 2 inches long 
as many broad; roundifh; red yellow or brown, fpott"“.j]i 
clouded, fometimes white with the upper valve fpotted 
brown ; margin repaid. 
* Opercula~ Shell with about 20 rays, roundifli and rough with decu^^* 
ris. flrite; the upper valve a little more convex. 
