Freshcater- Shells from Central Ajrka. 165 



correspond witli the denticles witliin, that behind the hxbrum 

 being remarkably deep. Pupa minuscula *, Morelet, closely 

 resembles this sj)ecies. 



Ennea suhhyalina. (PI. VI. fig. 13.) 



Testa cylindracea, ad apicom obtusa, hyalina, nitida, angusto rimata; 

 anfract. 7, leviter convexi, licves, ad suturam quasi anguste mar- 

 pinati, ultimus antieo constrictus, pone et infra hxbrura scrobicu- 

 latus ; apertura ringens, longit. totius -\ ajquans, dcntibus albis 

 SOX miinita : peristoma album, expansum et retlexum, marginibus 

 callo tenuissiruo junctis. 



Longit. 6 millim., diam. 2| ; apertura 2 longa et lata. 



JIah. Mamboia, at an altitude of 4000 to 5000 feet {Last). 



Five of the teeth within the aperture arc about equal in 

 size. Two are on a columellar ))rominence, two opposite on 

 the outer lip, and the fifth at tiie lower part of the aperture. 

 The sixth parietal tooth is tiiin, 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 siibjlavescens. (PI. VI. fig. 14.) 



Testa cylindracea, supeme obtusa, imperforata, nitida, subpellucida, 

 dilute flavescens ; anfract. 7, convexiusculi, Iffives, superne quasi 

 anguste marginati, ultimus pono et infra labrum scrobiculatus ; 

 apertura parva, longit. totius | adaeciuans, valde ringens, deutibus 

 9-10 inaequalibus, albia munita ; labrum leviter expansum et 

 incrassatum. 



Longit. 6 millim. , diam. 2 ; apertura 1| longa et lata. 



Hah. Same as E. suhhyalina. 



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. VI. fig. 15.) 



Testa anguste perforata, pupiformis, albida, epidermide tenui, pallido 

 viridi-flavescento induta, subnitida; anfractus 7, convexiusculi, 



• This species is figured (Journ. de Conch, 1877, pi. xii. fig. 5) under 

 the name 1\ Fischeriana. 



