341 
109. CyRENELLA MORETONENSIS, Desh. C. testa orbiculato- 
ovata, tumida, cordiformi, inequilaterali, transversim inequaliter 
striata, incrementi irregulariter contabulata, epidermide squalide 
Susca, striata, decidua vestita; latere antico paulo breviore, obtuso, 
superne declivi, attenuato, postico latiore, obtuse angulato ; area 
lata, angulo obtuso circumscripta ; umbonibus tumidis, oppositis, 
prominentibus ; cardine angusto inequaliter bidentato; valvis 
tenuibus, intus lutescentibus. 
Hab. Moreton Bay. Coll. Cuming. 
110. CyrRENELLA oBLONGA, Sow. MSS. C. testa ovato-trans- 
versa, turgida, inequilaterali, albo-flavescente, sub epidermide 
decidua, tenui, flavescente, transversim striato-sulcata, sulcis in- 
equalibus, obsoletissimis ; latere postico obtuse angulato, area 
magna, angulo circumscripta, in medio carinato-elevata ; umbo- 
nibus brevibus, obliquis, approximatis ; ligamento angusto, infosso; 
latere antico paulo angustiore, breviore, obtuso, postico late trun- 
cato; cardine angustissimo dentibus primariis minimis, inequalibus, 
in utraque valva majoribus, bifidis. 
Hab. Philippines. Coll. Cuming. 
111. CyRENELLA SENEGALENSIS. C. testa orbiculari, depres- 
siuscula, lenticulari, tenui, fragili, irregulariter et dense striata, 
sub epidermide virescente, lamellosa et reticulata squalide fusces- 
cente ; umbonibus tumidis, acutis, approximatis ; latere antico late 
obtuso, semicirculari, breviore, postico paulo angustiore ; cardine 
angusto, in valva dextra dentibus tribus, divergentibus, mediano 
interposito, in valva sinistra dente unico angustissimo, lamelloso, 
elongato, adjecto altero posticali, brevissimo ; valvis intus albo- 
ceruleis. 
Hab. Senegal. Coll. Cuming. 
112. CyRENELLA LENTICULARIS. C. testa orbiculari, convex- 
iuscula, tenut, fragili, inequilaterali, lenticulari, sub epidermide 
viridi-fuscescente transversim lamelloso-reticulato, albo-cerules- 
cente ; latere antico breviore ; lunula magna, linea albescente, obso- 
lete prominente circumscripta; cardine angustissimo, dentibus 
cardinalibus duobus in valva deatra, unico in sinistra; dentibus 
compressis, minimis, obliquis ; ligamento angusto, elongato, partim 
immerso. 
Hab. ? Coll. Cuming. 
113. CyrENeELLA PisirorMis. C. testa orbiculari, inflata, sphe- 
roidali, tenui, fragili, subequilaterali, sub lente tenuissime striata, 
sub epidermide pallide straminea alba, latere antico angustiore, 
breviore, rotundato, postico late rotundato; cardine angusto, bi- 
dentato, dentibus inequalibus, majoribus bifidis ; cicatriculis mus- 
culorum longissimis, submarginalibus ; umbonibus tumidis, promi- 
nulis, obtusis, fere oppositis. 
Hab. Philippines. Coll. Cuming. 
