2t8 
WORMS. TESTACEA. 62. Venus. 
Papbya, 
Martca, 
Mun.fmd. tat. tab. t- fig- ii, 16. 17. 
Knorr. Vergn. i. tab. fig. 3. 4. 
Knorr delic. nat- ftl tab. fig. 9. 
Born Muf. Ctss. Vind. ted.p. 57 njign.flg. a, 
Chemn. conch. 6. tab, t.'j.fig. 271 — 273. 
Sciratt. Litterat. \ .fig. l, 2. , 
Inhabits the American Ocean, and is extremely rare and valua° ^ 
Shell equivalve, fomewhat heart-lhaped, rounded, pale, 
little gibbous before and behind, and marked with tranf''*^^ ^ 
parallel (harpened ribs; within iraooth white and arched ® 
vaulted under the knobs; hinge of the left vzH(t 3-toothed, 
teeth approximate and diftinft from the focket, the middle 0 ^ 
comprefled and fmaller, the lateral ones divergent thickilb 
obtufe ; the other valve with 2 approximate compreifed . 
between 2 hollows: margin or rim very obtufe and 
beaks recurved rather obtufe and glabrous at the tip, 
ovate fleih -colour deprelfion behind them : the flattened *' 
flelh-colour with a pale border and yellowilh ftripe read'll 
half way from the beaks, obliquely ftriate, and furnilhed 
a row of fpines each ftde originating from every fecon“.. . 
third rib of the fliell, the fpines incurved growing 
longer and grooved beneath j within thefc and near the be"'* 
is another row of 5 fmaller fpines each fide. 
Shell fomewhat heart-fliaped with thickened wrinkles! .* 1 ** 
flattened fide with attenuated wrinkles, and comph 
ted lips. ^ 
Lifler Conch, tab. 279. Regenf, conch, i.tab, J-fig. ii» 
Bonann, recr. 2. fig. 75. Muf. kirch. 2. fig- 72. 
Rumpf. Muf. tab. 48. ftg, 5. Gualt teft. tab, 85. A, 
Spevgl. conch, tab. I. fig. I. Argenv. conch, tab. 21. B. 
Knorr, Kergn. 2. tab. 28. fig. 2. 6. t. ^.f, 6, t, 6.f, 2. 
Chemn. conch, 6‘ tab. 27. //^. 274— 27.6. 
2. Chemn. costch. 6. tab. 2"]. fig. 277. 
3. Knorr Vergn. 6. tab. ^.fig- 6. 
Inhabits American Ifands'. 2 inches long, l \ broad. 
Shell white with brown fpots ftri® and wa ves, the anterior P j 
with (angular brownilh lines ; the tranfverfe ribs are br 
and convex ; behind the beaks a brown depreflioa. 
Shell fomewhat heart-fhaped, with decuffate ilnffi : 
flattened margin lamellous. 
Lister conch, tab. 497. Argenv. Zoom, tab, 1 2. C. 
Chemn. cone. 6. tab. 2’]. fig. 282 — 286. 
Inhabits the American Ocean ; very rare. jjj 
Shell white with reddifh-brown fpots rays and veins ; the nisfe 
crenulatc. 
