165 
Freshwater- Shells from Central Ajrica. 
correspond with the denticles within, that behind the labrum 
being remarkably deep. Pupa minuscula *, Morelet, closely 
resembles this species. 
Ennea subhyalina . (PI. YI. fig. 13.) 
Testa cylindracea, ad apicem obtusa, hyalin a, nitida, anguste rimata ; 
anfraet. 7, le viter convexi, laeves, ad suturam quasi anguste mar- 
ginal, ultimus antice constrictus, pone et infra labrum scrobicu- 
latus ; apertura ringens, longit. totius ^ aequans, dentibus albis 
sex munita ; peristoma album, expansum et reflexum, marginibus 
callo tenuissimo junctis. 
Longit. 6 millim., diam. 2| ; apertura 2 longa et lata. 
Hab . Mamboia, at an altitude of 4000 to 5000 feet {Last). 
Five of the teeth within the aperture are about equal in 
size. Two are on a columellar prominence, two opposite on 
the outer lip, and the fifth at the lower part of the aperture. 
The sixth parietal tooth is thin, lamellar, curved, and joins 
the extremity of the labrum. E . larva , Morelet, is a smaller 
species, with longer whorls and only a single tooth on the 
columella. 
Ennea siibflavescens . (PI. YI. fig. 14.) 
Testa cylindracea, superne obtusa, imperforata, nitida, subpellucida, 
dilute flavescens ; anfraet. 7, convexiusculi, laeves, superne quasi 
anguste marginati, ultimus pone et infra labrum scrobiculatus ; 
apertura parva, longit. totius | adaequans, valde ringens, dentibus 
9-10 inaequalibus, albis munita ; labrum leviter expansum et 
incrassatum. 
Longit. 6 millim., diam. 2 ; apertura 1| longa et lata. 
Hab . Same as E. subhyalina . 
This species is remarkable for its cylindrical form and the 
armature of the mouth. The columella is prominent, with 
three teeth upon it ; two teeth are at the lower part of the 
aperture, three, of which the middle one is largest, within the 
right lip, and a very prominent, thin, squarish one on the 
whorl and joining the termination of the labrum. Three 
out of four specimens exhibit a tenth minute denticle at the 
lower part of the mouth. 
Ennea amicta. (PI. YI. fig. 15.) 
Testa anguste perforata, pupiformis, albida, epidermide tenui, pallide 
viridi-flavescente induta, subnitida ; anfractus 7, convexiusculi, 
* This species is figured (Journ. de Conch. 1877, pi. xii. fig. 5) under 
the name P. Fischeriana . 
