BIVALVE SHELLS. 121 



mellis tenuibus transversis latis distantibus roseo maculatis 

 cincta, pube interruptis ; lunula cordiformi, squamis latis 

 prominentibus circumdata ; pube excavata, marginibus tenue 

 crenulatis. 



Valentyn, Amb. pl 16. f.29. 



Venus calophylla, Hanley in Wood, Ind. Suppl. pl. 16. f. 26. 



Sow.jun. Thes. Conch. p. 724. pl. 160. f. 176. 

 Venus tiara, Reeve, Conch. Syst. i. pl. 67. f. 3 (non Dillw.). 



Hab. Oceanus Indicus et Chinensis ; Australia {Jukes). 



5. Chione Cumingii. B.M. 



C. testa rotundato-trigona, ventricosa, cordiformi, valde inaequi- 

 laterali, antice obtusa, postice angulata, SEtate subrostrata, 

 albo-lutescente vel grisea, lamellis tenuibus erectis slmplici- 

 bus cincta, antice posticeque abrupte interruptis, et lunulam 

 areamque circumscribentibus ; lunula brevi, cordata, plana, 

 Igevigata, inferne elatiore ; area elongato-lanceolata, excavata, 

 in margine angulosa ; valvis intus albis, postice pallide purpu- 

 reis ; sinu pallii brevissimo triangulari, aequilaterali ; umboni- 

 bus valde incurvatis, appressis. 



Venus Cumingii, Sow.jun. Thes. Conch. p. 725. pl. 157. f- 122. 



Hab. Nova Hollandia. 



6. Chione lamellosa. B.M. 



C. testa ovato-trigona, inaequilaterali, turgidula, postice longiore, 

 angulata, roseo-ferruginea ; cingulis foliaceis distantibus pos- 

 tice interruptis cincta ; area posticali impressa, violacea vel 

 purpurea, ad marginem laciniata; lunula late cordata, Unea 

 impressa circumscripta, subtus squamulis erectis circumdata, 

 intus alba; marginibus tenuissime crenulatis. 



Venus casina, var. S, Linn. Mus. Ulr. p. 498. 



Veuus lamellosa, Chemn. Conch. vi. 298. pl. 28. f. 293, 294. 



Var. /3, Lamellis brevioribus. 



Hab. ? 



7. Chione tiara. B.M. 



C. testa ovato-trigona, subcordata, compressa, alba, rubro-vio- 

 lascente triradiata ; lamellis acutis, tenuibus, latis, erectis, di- 

 stantibus, transversaliter instructa, lamellis in latere postico 

 depressis et in margine pubes prominentibus ; lunula ovata, 

 depressa ; marginibus tenuissime crenatis ; latere postico intus 

 violaceo. 



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