9 
37. Tapes axpa, Desh. T. testd ovatd, transversd, inequilate- 
rali, turgiduld, antice obtusd, postice latiore, oblique truncata, 
crassd, solidd, intus extusque candidd ; umbonibus brevibus, de- 
pressis, vie obliquis, oppositis ; lunuld elongato-angustd, vix per- 
spicud, irregulariter striatd; ared angustissimd, vix depressd ; 
valvis extus irregulariter sulcatis, sulcis in medio depressis ; 
sinu pallit brevi, angusto, apice attenuato, semielliptico. 
Hab. Western Australia (Swan River). Coll. Cuming. 
38. Tapers opscurata, Desh. J. testd ovato-transversd, ob- 
longd, inequilaterali, tumiduld, squalide rufescente, maculis 
minimis, unidentatis, fuscis obscurd, radiis quatuor fuscis, sub- 
articulatis notatd, transversim tenue et regulariter sulcatd ; 
sulcis antice angustioribus, in medio et ad latus posticum sen- 
sim latioribus; latere antico brevi, angustato, subangulato, 
postico latiore, obtuso; valvis tenuibus, intus pallide croceis ; 
sinu pall profundo, oblique ascendente, apice obtuso, margini- 
bus parallelis. 
Hab. ? Coll. Cuming. 
39. Tapes BrrapiatTa, Desh. (Pl. XIX. fig. 5.) 7. testd ovato- 
transversd, tumiduld, inequilaterali, eatremitatibus obtusd, fla- 
vescente, antice posticeque maculis minimis, pallide fuscis grised, 
radus duobus castaneis, latis, interruptis ornatd, transversim et 
regulariter tenue sulcatd ; sulcis antice minoribus, in medio la- 
tioribus eminentioribusque, postice angustioribus et leviter un- 
dulatis ; lunuld lividd, concavd, levigatd, vie distinctd ; ared 
elongato-laciniatd, pland, levigatd, lividd, lineis violaceis litu- 
ratd ; valvis intus albis; margine cardinali antice et postice 
violaceo maculato; sinu pallii angusto, obtuse, marginibus paral- 
lelis. 
Var. (3. Testd minore, turgidiore, radiis evanescentibus ; valvis 
maculis minimis et lineis angulosis irregularibus ornatis. 
Hab. Philippines (Puteao). Coll. Cuming. 
40. Tapes quaprrrapraTa, Desh. (Pl. XIX. fig. 6.) T. testd 
transversd, ellipticd, turgiduld, inequilaterali, utroque latere 
obtectd, antice angustiusculd, albo-luted, lineis fuscis, angulatis, 
numerosis densissime pictd et quadriradiatd, radiis maculis 
quadratis fuscis et albis subarticulatis ; striis transversis regu- 
laribus numerosis, depressiusculis, postice planis et latioribus ; 
lunuld fusco-violascente, elongato-angustd, politd, fusco dense 
lineolatd ; ared angustd, excavatd, in medio maculd violaceo- 
lividd notatd ; valvis intus pallide luteis ; sinu pallii lato, semi- 
elliptico. 
Hab. Philippines. Coll. Cuming. 
41. Tapes Grata, Desh. T. testd ovatd, transversd, inequi- 
laterali, compressd, antice angustiore et breviore, postice latiore, 
obtusd, transversim eleganter tenue sulcatd, albo-flavescente 
eleganter lineis fuscis tenuibus reticulata et obsolete radiata, 
