218 
WORMS. TESTACEA. 62. Venus. 
Murr. fund. test. tab. 2. figs 11, 16. 17. 
Knorr. Vergn. Y. tab. 4s fig. 3s 4. 
Knorr delic. nat. fel. tab. B. fig. 9. 
Born Muf. Cas. Vind. tell. p. $7. ign. fig. as 
Chemn. conch. 6. tab, 27. fig. 271—272. 
Sckrat. Litterat. Y. fig. 1, 2. 
Inhabits the American Ocean, and is extremely rare and valuable. 
Shelf equivalve, fomewhat heart-fhaped, rounded, pale, pink, a 
little gibbous before and behind, and marked with traníverfe 
parallel fharpened ribs; within fmooth white and arched or 
vaulted under the knobs: Ainge of the left valve 3-toothed, the 
teeth approximate and diftinct from the focket, the middle one 
comprefled and fmaller, the lateral ones divergent thickifh and 
obtufe; the other valve with 2 approximate compreffed teeth 
between 2 hollows: margin or rim very obtufe and entire: 
beaks recurved rather obtufe and glabrous at the tip, with an 
ovate flefh-colour depreffion behind them: the flattened fide 
flefh-colour with a pale border and yellowifh ftripe reaching 
half way from the beaks, obliquely ftriate, and furnifhed with 
a row of fpines each fide originating from every fecond or 
third rib of the fhell, the fpines incurved growing gradually 
longer and grooved beneath; within thefe and near the beaks 
is another row of 5 imaller {pines each fide. 
Paphya. — Shell fomewhat heart-fhaped with thickened wrinkles; the 
N 
flattened fide with attenuated wrinkles, and complica- 
ted lips. 
Lifer Conch. tab. 279. Regenf. conch. 1. tab, 7. figs 1t. 
Bonann. recr. 2. fig. 75. Muf. kirch. 2. fig- 72. 
Rumpf. Muf. tab. 48. fig. 5. Gualt. teft. tab. 85. A: 
Spengl. conch. tab. 1. fig. 1. Argenv. conch. tab. 21. B. 
Knorr, Vergn. 2. tab. 28. fig. 2. 6. ^£. Ge fe Oe. 6. f. z. 
Chemn. conch. 6* tab. 27. fig. 274—276. 
.. Chemn. conch, 6. tab. 27. fig. 277. 
3. Knorr Vergn. 6. tab. 5. fig. 6. 
Inhabits American Iflands: 2 inches long, 1 $ broad. ——— 
Shell white with brown fpots ftriz and waves, the anterior part 
with angular brownifh lines: the tranfverfe ribs are broad 
and convex: behind the beaks a brown depreflion. 
Marisa, Shell fomewhat heart-fhaped, with decuffate ftria: the 
flattened margin lamellous. 
Lister conch. tab. 497. Argenv. Zoom. tab. 12. C? 
Chema. conc. 6. tab. 27. fig. 282—280. 
Inhabits the American Ocean: very rare. t 
Shell white with reddifh-brown fpots rays and veins; the margin 
crenulate. 
Dyfera. 
