186 
by the transverse lines on the lower part of the whorl. These lines 
are remarkably parallel, regular and well-impressed, and in the four 
specimens under examination are six in number. The folds are like 
ribs, very numerous, closely set, and very distinct. The form of this 
species, described above, is very like Tornatella, and the twist in the 
columella also resembles that genus. The ribs continue on the apex 
and give it a scalariform appearance. The aperture is nearly one- 
half the length of the shell. The edge of the lip, below the emargina- 
tion, is slightly crenulate. The columella is very thick towards and 
at the base, where it is so retuse as to permit the inside to be seen. 
One of the specimens is rubiginose at the base. No operculum ac¬ 
companied the specimens. 
Melania rudis. M. testd plicatd, subfusiformi, crassd, corned; 
spird subelevatd; suturis irregulariter impressis; anfractibus pla- 
nulcitis transversim lineis impressis cinctis, superne canaliculatis; 
plicis numerosis, crebris; aperturd parvd, ovata, intus albidd; 
labro superne emarginato ; columelld Icevi, subcrassd, tortd. 
Hah. Amboyna. 
Length Tl, diam. *4 of an inch. 
Remarks. —Allied to Melania tornatella , it forms one of the 
emarginate group, but differs in the size of the aperture and in the 
form of the ribs, which are transversely cut by numerous fine lines, 
in groups, which lines traverse the whole whorls. The aperture is 
about one-third the length of the shell, and the lip is crenulate. The 
three specimens under examination are all truncate at the apex, and 
the number of whorls therefore not ascertained. It has the spiral 
operculum usual to Melania. 
Melania microstoma. M. testd plicatd, subfusiformi, subcrassd, 
luteo-corned; spird elevatd; suturis irregulariter impressis; an¬ 
fractibus octo, planulatis, transversim lineis impressis cinctis, su¬ 
perne canaliculatis; plicis numerosis, crebris; aperturd maximd, 
ovatd, ad basim truncata, intus ccerulescente; labro superne emar¬ 
ginato ; columelld Icevi, ad basim subcrassd toy'tdque. 
Hab. Mountain streams, isle of Negros, Philippines. 
Length *9, diam. - 3 of an inch. 
Remarks. —This belongs to the group with emarginate lip, along 
with M. rudis and M. tornatella. It is a more slender species, more 
subulate, and has a smaller aperture than either. It takes more the 
form of Terebra. It has groups of lines which decussate the ribs as 
in the rudis. The aperture is not one-third the length of the shell, 
and the lip is crenulate. No operculum was received with the shells. 
Melania transversa. M. testd plicatd, pyramidatd , crassd, cor¬ 
ned, castaneo-maculatd; spird elevatd; suturis irregulariter impres¬ 
sis; anfractibus subconvexis, transversim lineis impressis cinctis ; 
costellis verticalibus raris; aperturd parvd, oblique transversd, 
rhomboided, intus maculatd et ccerulescente; labro terebrceformi, 
crenulato; columelld contortd, superne incrassatd, inf erne emar- 
ginatd. 
