18] 
Length 1:6, diam. *5 of an inch. 
Remarks.—In the adult specimens the edge of the aperture is 
bluish white, and within more or less brown. In all cases the colu- 
mella is white in the four specimens under examination. They are 
covered nearly over the whole surface with a black deposit of oxide 
of iron. Near the base there are seven to ten indistinct strie. The 
aperture is about one-third the length of the shell. The operculum 
is ovate, and does not present any peculiar character. 
Meania sopria. WM. testd levi, acuto-conoided, subcrassd, 
luteo-corned ; spird elevatd, ad apicem costatd ; suturis impressis ; 
anfractibus duodecim, planulatis ; aperturd parvd, subovatd, intus 
albidd, ad basim rotundatd ; columellé regulariter curvatd. 
Hab. Very small streams, Siquijor, Philippines. 
Length 1-5, diam. °5 of an inch. 
Remarks.—A very regularly formed, light-coloured species. There 
are a few indistinct striz near the base. The sutures are very regu- 
lar and thread-like. The upper whorls are slightly maculate, and 
those nearest to the apex minutely plicate. The aperture is rather 
more than the fourth of the length of the shell, and is rounded at 
the base of the columella. 
MeE.LaAnia susuLa. WM. testd levi, acuto-conoided, tenui, castaned ; 
spird valde elevatd, acuminata; suturis impressis ; anfractibus 
duodecim, subconvexis ; aperturd parvd, contractd, intus vel albida 
vel rufo-castaned. 
Hab. Small river in the province of Ho Ho, isle of Panay, Phi- 
lippines. 
Length 1-8, diam. °4 of an inch. 
Remarks.—-This is a delicately formed species, very much atte- 
nuated, with six or eight impressed, small striz at the base. In the 
darker specimens, the upper part of the whorl at the suture is lighter- 
coloured than the other part. The upper whorls are finely striate. 
The aperture is small, about one-fourth the length of the shell, and 
rounded at the base of the columella. 
Mevania acus. WM. testd levi, conoided, subtenui, corned ; spird 
acuminatd, ad apicem costatd ; suturis subimpressis ; anfractibus 
undecim planulatis ; aperturd parvd, ovatd, intus cerulescente ; 
columella regulariter curvata. 
Hab. Small stream, Guimaras, Philippines. 
Length 11, diam. *3 of an incb. 
Remarks.—This is a regularly formed, small species. The speci- 
mens under examination are nearly covered with a deposit of oxide 
of iron, which on removal displays a horn-coloured epidermis. The 
aperture is nearly one-third the length of the shell, and is rounded 
at the base. 
MELANIA DERMESTOIDEA. WM. testd levi, politd, subcylindraced, 
crassd, tenebroso-castaned ; spird subelevatd ; suturis impressis ; 
anfractibus sex, subplanulatis ; apertura ovata, ad basim canali- 
culatd, intus rufescente ; labro incrassato. 
