188 
crassd, tenebroso-corned; spird subelevatd; suturis valde im- 
pressis ; anfractibus convezis, infra suturas impressis, striis cre- 
bris impressis ; aperturd parvd, ovata, intus cerulescente, ad basim 
rotunda ; columella regulariter incurvatd. 
Hab. Naga, Luzon, Philippines. 
Length 1°6, diam. *5 of an inch. 
Remarks.—The species has a very close resemblance to the striate 
varieties of M. Virginica, Say. The three adult specimens under 
examination are truncate, and the number of whorls therefore not 
ascertainable, but probably about nine. The impressed revolving 
lines are somewhat distant, regular and delicate. Between these, 
under the microscope, may be seen very minute revolving striz. The 
aperture is about one-fourth the length of the shell. The operculum 
has its polar point near to the edge of the lower margin. 
Metantrs Luzonrensis. M. testd striatd, conicd, subtenui, tene- 
broso-corned ; spird erosd; suturis impressis ; anfractibus sex, 
converiusculis, transversim lineis rugosis impressis cinctis ; aper- 
turd magnd, elongato-ellipticd, intus rubiginosd ; columella alba 
tortdque. 
Hab. Small streams, Calanang, province of Bai, Philippines. 
Length 1°1, diam. *5 of an inch. 
Remarks.—There is no peculiarity in the outline of this species, 
and the most striking character is perhaps in the impressed lines, 
which are somewhat distant, having minute numerous wrinkles across 
the groove. They are very distinctly visible under the microscope, 
and do not seem to have been observed in any other species. The 
superior part of the whorls is disposed to be granose, and one speci- 
men has four rows of granules. Immediately under the sutures there 
is a yellow line. The aperture is one-half the length of the shell. 
The operculum has its polar point close to the lower margin. 
MELANIA ALBESCENS. WM. testd striatd, elevato-conicd, subtenui, 
albidd, lineis rufis interruptis ornatd ; spird acuminatd ; suturis 
impressis ; anfractibus undecim, planiusculis, lineis transversis 
vir impressis ; aperturd ovato-oblonga, intus albidd, rufo-macu- 
lata, ad basim rotunda ; columella incurva. 
Hab. Small streams, isles of Guimaras, Negros and Siquijor, Phi- 
lippines. 
Length 2°5, diam. -9 of an inch. 
Remarks.—This is a very regularly formed and graceful species, 
with rather a high and tapering spire. The impressed revolving 
strie are chiefly on the body whorl. The most striking character- 
istic is the numerous interrupted delicate brown lines, which cover 
nearly the whole of the whorls and are closer and better defined 
towards the apex. In some specimens there are beautiful brown 
spots on a white ground, below the sutures. The aperture is about 
one-third the length of the shell. The operculum has its polar point 
close to the lower margin on the left. There is a very great differ- 
ence in the size and thickness of the specimens. Some of the old 
are very large, heavy, and covered with the oxide of iron, showing 
