25 
longitudinaliter striatis, latere antico breviore latiore rotun¬ 
dato, postico longiore, angustiore subrostrato , valde hiante, 
margine ventrali postice subsinuato. 
Hab. In India Occidentali. 
Shell ovately triangular, concentrically lamellose, lamellae rather 
wide apart, the interstices with distinct longitudinal striae, anterior 
side shorter, wider, and rounded, posterior side longer, narrower and 
somewhat beaked, widely gaping, ventral margin posteriorly rather 
sinuated. 
Hab. West Indies. (Mus. Cuming.) 
Cumingia fragilis, A. Adams. C. testd transversd ovali albd 
fragili subpellucidd concentrice lamellosd ; lamellis elevatiuscu- 
lis , sub dist antibus, interstitiis tenuissime longitudinaliter stria¬ 
tis, latere antico latiore margine sinuato, postico angustiore ro- 
tundato subflexuoso, margine ventrali integro arcuato. 
Hab. in Guadaloupia. (Mollusca, PL VIII. fig. 7.) 
Shell transverse, oval, white, fragile, semipellucid, concentrically 
lamellose, lamellae rather elevated and wide apart, interstices very 
finely longitudinally striated, anterior side wider, the margin sinuated, 
posterior side narrower, rounded, subflexuous, ventral margin entire 
and arcuated. 
Hab. Guadaloupe ; Governor Admiral Tourbeyre. (Mus. Cuming.) 
Cumingia striata, A. Adams. C. testd ovato-trigonali sub- 
ventricosa albd tenui fragili; striis transversis concentricis ele- 
vatis confertis, interstitiis longitudinaliter striatis, latere an¬ 
tico latiore rotundato, postico subacuminato, margine ventrali 
postice coarctato. 
(Mollusca, PI. VIII. fig. 5.) 
Shell ovately trigonal, somewhat ventricose, white, thin, fragile, 
with transverse concentric crowded elevated striae, the interstices 
longitudinally very finely striated, anterior side wider and rounded, 
posterior side rather acuminated, ventral margin posteriorly con¬ 
tracted. 
Hab. Conception; seven fathoms, sandy mud; H. C. (Mus. Cu¬ 
ming.) 
Cumingia sinuosa, A. Adams. C. testd subtrigonali albd semi- 
pellucidd subcequilaterali concentrice lamellosd, insterstitiis lon¬ 
gitudinaliter substriatis, latere antico sublatiore rotundato, 
postico angustiore , margine ventrali postice valde sinuato. 
Hab. in India Occidentali. (Mollusca, PI. VIII. fig. G.) 
Shell subtrigonal, white, semipellucid, subequilateral, concentrically 
lamellose, interstices longitudinally substriated, anterior side rather 
wider and rounded, posterior side narrower, ventral margin posteriorly 
deeply sinuated. 
Hab. West Indies. (Mus Cuming.) 
