WORMS. TESTACEA. 66. Oftrea. 
259 
Shell with 18 flattened rays. 
Lijier conch, tab. 1 86 . ftg. 5 . 
Regenf. conch. 1 . tab. 1 1 . fig, 5 3 > 
Ktiorr Vergn. 2. tab. tgy fig, 3- f.20,f, 1. 
Chemn. conch. 7. tab, 61. fig. 590 — 592. 
Inhabits the American Oiean ; fometimes of one colour, fometimes 
variegated: ear/ very finely wrinkled : /s'luer-aWx/e convex, 
■with 18 — 20 rays, which are very finely ilriate tranfverfely, 
and about twice the number of perpendicular ftrirc within j 
ufptr-vahe fiat, with about twice as many angular lines as 
tiicre are rays. 
Shell with 16 faint rays with tranfverfe membranaceous 
ftritE ; the margin very entire. 
Inhabits the Indian Ocean. Muf. Lud. Ulr. 523. n. 101. 
ShelJ middle fi/xd, varied with purple and w'hite, within yel- 
lowifh ; intcrllices of the rays white : la<wer-‘vahe almoit as 
flat as the upper. 
Shell with 20 convex rays. 
Inhabits the Indian Ocean. Mtfi Lud. Ulr. 524. n. 102. 
about the fize of a nut: locver-njal've white and very con- 
vex : upper-'val’ve white clouded with brown, flatter and 
plaited. ’ ' 
Shell equi valve, with 12 doubled rays, and finooth 
outfide. 
on the 
Barbut, tab, 8. fig. 1. Rumpf. Muf. t. 45. A, I>. 
Argenni. conch, ted). 27. G. Guait. left. t. 73. R. 
Bonan. recr. 3. fig. 354. Muf, Kirch, i.f, 108. 
Peti-v. Amh. tab\\J . fig. I4' Lefjer tc.ji. y.89. 
Klein oflr. tab. ').fig. jO’ Knorr Vergn. \. tab. zo.f. 3, 4. 
Chemn conch. 7. tab. 61. fig. 595. 
2. Knorr Vergn. 5. tab 21. fig, 6. 
Inhabits the Indian Ocean', fometimes reddilh, or flefh-colour, or 
Itver-colour, within filvery ; 2) orange radiate with red : 4I 
inches long and gaping at each end. 
Upper-valve fubconvex, fmooth, with fine perpendicular 
lines crolijng very fine concentric tranfverfe ftriae ; 
lower-valve w'ith 24 rays, and 48 Arise within. 
Chemn conch. 7. tab. 61. Ag'. 593. 
Inhabits lliores of South America: very rare. 
Shell 2 inches 8 lines long and about as much broad; upper-’val’ve 
chefnut with white rays and whitiftl fpots; lonjoer-ntalnte white 
lhaded with yellowilh, the valves a little darker. 
Kk 2 
ycpcttica 
