183 
MetaniA Cocuuipium. WM. testd levi, subulatd, subcrassd, rufo- 
corned ; spird elevatd, acuminatd, ad apicem minut? plicatd ; sutu- 
ris regulariter impressis ; anfractibus tredecim, subcompressis, an- 
Sractu ultimo supra angulato, magno ; aperturd late ovatd, parva, 
ad basim retusd, intus albidd ; columelld regulariter incurvd. 
Hab. Very small streams, islands of Siquijor and Guimaras, Phi- 
lippines. 
Length 1-5, diam. °5 of an inch. 
Remarks.—This is a very remarkable species, having a single ele- 
vated, revolving rib on the superior part of the last whorl, which 
causes a somewhat impressed channel above. The four specimens 
under examination from Siquijor are fresh and with perfect epi- 
dermis, which varies on the younger specimens to rather a pale horn- 
colour, while the more mature ones are of a reddish horn-colour. 
The four from Guimaras are “dead shells,’ rather more robust, 
with a portion only of the epidermis remaining, which is rufous. 
The aperture is about one-fourth of the length of the shell. The 
operculum has its polar point near the base on the left side. 
Metania crncta. WM. testd levi, subulatd, subtenui, rufo-cas- 
taned ; spird valde elevatd, acuminatd, ad apicem plicatd ; sutu- 
ris impressis, linearibus ; anfractibus tredecim, subconveais ; an- 
Fractu ultimo uno-vittato ; aperturd dilatatd, ovatd, intus fusco 
Sasciaté, ad basim rotunda ; columella contortd. 
Hab. India. 
Length 2°2, diam. °6 of an inch. 
Remarks.—The form of this species is very much like that of 
Melania aculeus (nobis), but it is a more attenuate species. The 
single light band on the lower whorl seems to be peculiar to this 
species. It is below the middle part of the whorl, and is distinctly 
visible on the inside in the three specimens under examination. The 
upper whorls have regular, oblique, somewhat distant folds, on two 
of the specimens, which are crossed by minute strie. The lower 
part of the whorl has indistinct strie. The aperture is not large, 
being less than one-fourth the length of the shell, and it is rounded 
at the base. The columella is much incurved. 
MELANIA LANCEA. WM. testd levi, subulatd, subtenui, corned ; 
spird elevatd, ad apicem striata; suturis impressis ; anfractibus 
duodecim, convewxis ; aperturd ovatd, intus albidd, ad basim ro- 
tundd ; columelld angulariter incurvd. 
Hab. Ohcataroa, Society Islands. 
Length 1°6, diam. *5 of an inch. 
Remarks.—This species is in form somewhat like the M. aculeus 
(nobis), but is a smaller shell and not quite so attenuate. In the 
four specimens under examination small strize are distinctly marked 
on the superior or younger whorls, and on two of them some of the 
striee are continuous on the lower whorls. The aperture is not 
large, being not quite one-third the length of the shell. The colu- 
mella is much incurved and recurved. 
