4 
2 
antico longiore, obtuso, postico oblique subangulato, extremitate 
truncato ; vulvd angustd lanceol.td, margine acuto circumserip- 
td; lunuld lividd angustissimd, non impressd, vix distinctda ; 
valvis intus violaceis ad margines pallidioribus. 
Hab. Philippines. Coll. Cuming. 
4. Dione RvuFESCENS, Desh. D. testd ovato-trigond, transversd, 
tumidd, inequilaterali, levigatd, transversim irregulariter stri- 
atd, rufescente pallide castaned, postice angulo obliquo obso- 
leto inflexd, antice angustiore obtusd, postice declivi, convexius- 
culd, margine inferiore convexo, antice ascendente ; umbonibus 
brevibus, tumidulis, obliquis ; lunuld magnd, ovato-cordatd, in 
longitudinem convexd, ad apicem atro-violaced, fused, et lineis 
fuscis fulguratd ; ared elongato-acuminatd, fused ; valvis intus 
pallide croceis ; margine cardinali postice rubro maculato ; 
sinu pallii profundo, satis lato, apice obtuso, basi latiore. 
Hab. Philippines. Coll. Cuming. 
5. Dione crocra, Desh. D. testd ovato-trigond, turgidd, cor- 
diformi, inequilaterali, levigatd, politd, tenui, intus extusque 
pallide aurantid, ad marginem inferiorem saturatiore ; umboni- 
bus tumidis, parum obliquis, acutis, roseis; lunuld vix distinctd, 
magnd, ovato-cordatd, lined tenuissimd circumdatd ; ligamento 
immerso ; ared posticali indistinctd, intensiore coloratd ; valvis 
tenuibus ; sinu pallii parum profundo, trigono, apice obtuso. 
Hab. Philippines. Coll. Cuming. 
6. DioNE PHASIANELLA. JD. testd minimd, transversim sulcatd, 
ovato-transversd, inequilaterali, antice rotundatd, postice an- 
gustiore, obtuse angulatd, lateraliter compressiusculd, violaceo- 
castaned, punctulis lineolisve angulosis notatd, biradiatd, ra- 
diis albo et fusco articulatis ; umbonibus minimis, albis ; lunuld 
minimd, saturate castaned, in medio convexiusculd ; latere pos- 
tico lineis fuscis eleganter liturato, sulcis regularibus, depressis, 
posterius latioribus ; valvis intus albo-violaceis. 
Hab. ? Coll. Cuming. 
7. Venus Sowersyi, Desh. JV. testd ovato-subquadratd, in- 
equilaterali, turgidd, cordiformi, crassissimd, ponderosd, albd, 
rufo pallido quadriradiatd, antice obtusd, brevi, postice latiore, 
oblique et late truncatd, longitudinaliter tenue et regulariter 
sulcatd, lunulis brevibus, crassis, erectis, irregulariter disposi- 
tis, crenulatis, postice latioribus tenuioribusque, decussatd ; 
umbonibus magnis, cordatis ; lunuld magnd, pland, impressd, 
rufo-purpurascente ; ared dorsali elongato-lanceolatd in valvd 
sinistrd, maculix magnis castaneis notatd ; valvis intus pallide 
flavicantibus. 
Hab, Philippines. Coll. Cuming. | 
8. Venus crispata, Desh. V7. testd ovato-transversd, turgidd, 
inequilaterali, antice brevi, postice latiore, subtruncatd, albd, 
rufoirregulariter maculatd, transversim multi-lamellosd; lamellis 
