/ 
27. CrRCE LENTICULARIS, Desh. C.testd ovato-subtrigond, in me- 
dio turgidd, ad peripheriam acutd, inequilaterali, antice postice- 
que obtusd, transversim sulcato-plicatd, albd, lineolis castaneis, 
angulatis, vel undulatis, interruptis, ornatd; suleis in latere 
postico evanidis ; umbonibus depressis, plicis obsoletis, divari- 
catis, notatis ; lunuld angustd, atro-fuscd, lanceolata ; vulvd 
profunde excavatd, atratd, lineis atris, irradiantibus ornatd ; 
valvis intus pallide croceis; impressione pallit brevissimd, in 
medio valvarum positd. 
Hab. 2? Coll. Cuming. 
28. Crrce Mercauret, Desh. C. ftestd orbiculato-subtrigond, 
tumiduld, subequilaterali, candidd, fusco rare maculata, maculis 
in medio serialibus, transversim tenue sulcatd, suleis inequa- 
libus, numerosis, convexis, antice posticeque striis tenuissimis, 
divergentibus, intersectis ; lunuld ovato-lanceolatd aredque 
fusco maculatis seu candidis ; valvis intus flavo-rufis, ad mar- 
gines albis ; cardine angusto, dente antico valde separato. 
Hab. 2 Coll. Metcalfe. 
, 
29. Meretrix GRATA, Desh. WM. testd minimd, ovato-trigond, 
depressiusculd, inequilaterali, nitidissimd, late profundeque 
transversim sulcatd ; sulcis regularibus, rotundatis, interstitiis 
subequalibus separatis, simplicibus, rubescentibus, interstitis 
pallide luteis; umbonibus acutis, parvis, angustis, elatis; lunuld 
pland, ovato-angustd, elongatd, lividd; ared planulatd, levigatd ; 
valvis intus albis, maculd angustd castaned in margine postico ; 
sinu pallii latissimo, semicirculart. 
Hab. Chinese Seas. Coll. Cuming. 
30. CHIoneE GiBBOSULA, Desh. C. testd rotundato-trigond, obl- 
qud, inequilaterali, convexiusculd, antice brevi, obtusa, inferne 
convead, superne arcuato-gibbosd, postice subangulatd; alba, 
postice fusco cerulescente vel radiata vel pallide violaced ; latert- 
bus et apicibus longitudinaliter costatis, rugis transversalibus, 
undulosis, decussatis, et crenulatis ; in latere postico costis plu- 
ribus majoribus, alteris tenue granulosis ; lunuld nulld ; valvis 
intus albis, impressionibus muscularibus violaceis ; sinu pallit 
horizontali, trigono, acuto, subequilaterali. 
Hab. ? Coll. Cuming. 
31. Cu1one reEGuLARIS, Desh. C. testd ovato-trigond, trans- 
versd, turgidd, inequilaterali, antice obtusd, postice dechivi, 
subangulatd, subrostratd, margine ventrali valde arcuato, flavo- 
grised, postice nigro-violascente, transversim regulariter et ele- 
ganter sulcatd; sulcis convevis, equidistantibus ; lunuld elon- 
gato-ovatd, perpland, levigatd, nitente, superne violaceo macu- 
latd; ared parvd, elongatd, lanceolatd, pland; valvis intus albis; 
cardine antice posticeque violaceo maculato ; sinu pallit lato, 
obliquo, brevi, semiovalt. 
Hab. Philippines. Coll. Cuming. 
