320 
epidermide polita, nigro-virescente vestita ; umbonibus tumidis; 
intus cerulea ; cardine angusto, obliquo, inequaliter tridentato; 
dentibus cardinalibus simplicibus ; lateralibus angustis. 
Long. 3, lat. 22, diam. 14, poll. 
Hab. 4 
4. BarissA comprREsSSA, Prime. B. testa ovato-orbiculari, tu- 
mida, compressa, subequilaterali, intus violacea, epidermide 
polita, atro-virescente vestita ; umbonibus erosis, dentibus car- 
dinalibus subequalibus, lateralibus elongatis, serrulatis. 
Long. 22, lat. 23, diam. 1,4, poll. 
Hab. Borneo. 
5. BarissA INFLATA, Prime. B. testa magna, orbiculari, ine- 
quilaterali, crassa, solida, obtusa, epidermide rugosa, fusco- 
nigrescente vestita; umbonibus productis, erosis, obliquis; valvis 
intus albis et violaceis ; dentibus cardinalibus crassis, subequa- 
libus ; lateralibus angustis. 
Long. 34, lat. 34, diam. 21, poll. 
Hab. Nicobar. 
6. BattssA Minor, Prime. B. testa parva, tenui, suborbiculari, 
valde obliqua, subequilaterali, depressiuscula, transversim re- 
gulariter striata, epidermide polita, virescente vestita, intus 
violacea ; dentibus cardinalibus tribus, inequalibus, brevibus 
subcanaliculatis ; lateralibus elongatis, regulariter et tenuiter 
serrulatis. 
Long. 1,4, lat. 2;2,, diam. 4, poll. 
Hab. Feejee Islands. 
7. Batissa Fortis, Prime. B. testa orbiculari, oblique inequi- 
laterali, tumida, crassa, intus violacea, epidermide nigro-vires- 
cente vestita, umbonibus prominentibus, erosis, antice inclinatis, 
dentibus cardinalibus crassis, subequilateralibus ; lateralibus 
angustis, brevibus. 
Long. 2,8, lat. 24, diam. 14, poll. 
Hab. New Caledonia. 
8. BarissA ELONGATA, Prime. B. testa orbiculato-trigona, in- 
fiata, subcordiformi, inequilaterali ; epidermide fusca vestita ; 
umbonibus tumidis, erosis ; valvis solidis, intus albis ; dentibus 
cardinalibus inequalibus, prominentibus, duobus bifidis ; denti- 
bus lateralibus brevibus. 
Long. 34, lat. 23, diam. 14, poll. 
Hab. New Caledonia. 
9. Cyrena FLAVA, Prime. C. testa orbiculato-trigona, depres- 
siuscula, transversim inequaliter striata, inequilaterali, epi- 
dermide luteo-flavescente vestita, valvis crassis, solidis, intus 
candidissimis ; umbonibus parvis, obliquis, erosis ; cardine an- 
