189 
beneath a brown epidermis and white nacre. In these the peritreme 
is very thick, and the columella more remarkably thick than hereto¬ 
fore noticed in any Melanian. 
Melania hastula. M. testd striatd, nonnunquam plicatd, elon¬ 
gate subulata, diaphand, tenui, fused, striis transversis crebris 
costulas de cuss antibus; spird acuminatd; suturis linearibus; an - 
fractibus plano-convexis; aperturd parvuld; ovata, intus v el fused 
vel albidd; columelld incurvd tortdque . 
Hab. Various streams of Siquiior, Cagayan, Mindanao, and other 
Philippine Islands. 
Length 3'3, diam. *8 of an inch. 
Remarks. —A very attenuate and greatly varied species, some 
being smooth with few striae, others with striae over the whole sur¬ 
face, and others again with numerous folds. In some of the speci¬ 
mens under examination the apex is eroded in a very unusual manner, 
the outer portion of the whorls there being so much decomposed as 
to present little more than the central column. Some of the speci¬ 
mens are dark brown, others are horn-colour with brown spots. 
There are probably about twelve whorls. Although some of the 
specimens have more or less distinct, somewhat distant folds, there 
are others which have no folds whatever. This species is placed 
among the striate group, as striee are found more or less developed 
on every specimen. The strise immediately below the suture are 
more deeply impressed and cause a slight groove. A varietv from 
Camiguing is flatter on the whorls and less disposed to plication. 
The aperture is not cpiite one-fourth the length of the shell, is rather 
open and somewhat patulous below. The operculum has its polar 
point near to the margin on the left. 
Melania jtjncea. M. testd striatd, elongate subulata, tenui, 
tenebroso-fused, infra suturas luteo-lineatd; spird attenuatd; 
suturis valde impressis, anfractibus undecim, convexis, lineis trans¬ 
versis impressis ; aperturd parvuld, ovatd, intus fused; columelld 
valde incurvd contortdque. 
Hab. Lake of Taal, province of Batanos, and small streams in 
Luzon, Philippines. 
Length 2, diam. ‘5 of an inch. 
Remarks. —An attenuate and gracefully formed species. Some of 
the specimens are of a dark rich brown, others are flammate. Two 
have very small incipient folds on nearly all the whorls, others have 
a few towards the apex. From the same locality are four specimens, 
which, while they differ but little in form, are very different in colour, 
being yellowish, with longitudinal flammate brown marks. This variety 
answers very closely to M. fammulat a, Yon dem Busch, 4 Conchy lien/ 
&c. by Dr. Philippi, tab. 1. fig. 3, 4. The aperture is about one- 
fourth the length of the shell and is rather small, with a patulous lip 
having a whitish border. The operculum has its polar point rather 
near to the margin. Gualtierus (tab. 6. fig. G) gives a drawing of a 
freshwater shell closely resembling this variety. Another variety is 
rather thinner, diaphanous, horn-colour, and obscurelv maculate. 
