Freshwater- Shells from Central Africa . 157 
In the single specimen from the above locality the striae 
upon the upper whorls are strongly marked near the suture 
above, and become weaker towards the lower part. On the 
last volution, however, the strige are equally strongly incised 
all over the surface, being especially distinct near the outer 
lip. There is a slight depression below the suture in this 
whorl, but it may only be an individual peculiarity. 
In three specimens collected by Sir J. Kirk in Usagara, 
which are smaller than the type, the striae are still stronger 
and continue from suture to suture. They also differ in having 
the whorls slightly more convex and in being imperforate ; but 
this may be due to their immaturity. Notwithstanding these 
differences, on placing them side by side they all appear to 
belong to the same species. 
Bulimus ( Hapalus ) associatus. (PL V. fig. 14.) 
Testa elongata, angusta, vix perforata, nitida, albida, vel cerea ; 
anfract. 6, convexi, lente accrescentes, striis fortibus, regularibus, 
confertis, subhorizontalibus, leviter curvatis, sculpti, sutura paulo 
obliqua discreti, ultimus parvus ; apertura parva, longit. totius 
| adaequans ; labrum tenue, leviter arcuatum ; columella leviter 
con tort a, expansa et reflexa, callo tenui labro juncta. 
Longit. 7| millim., diam. 3-|-; apertura 3 longa, 1| lata. 
Hab. Mamboia, at an elevation of 4000 to 5000 feet. 
This species has the sculpture very like that of Hapalus 
disparilis , but is quite distinct on account of its very diffe- 
rent form. 
Stenogyra ( Subulina ) subcar inif era. (PL V. fig. 15.) 
Testa elongata, superne acuminata, imperforata, nitida, olivaceo- 
fusca ; anfract. 7, primus intortus, sequentes duo convexi, costis 
oblique curvatis subdistantibus ornati, cgeteri convexi, costis 
tenuioribus, valde confertis, instructi, sutura leviter obliqua, pro- 
funda, discreti, ultimus oblongus, circa medium linea elevata 
indistincta cinctus ; spira producta, ad apicem obtusa ; apertura 
irregulariter pyriformis, longit. totius § subaequans ; labrum 
tenue, antice angustissime expansum ; columella albida, in medio 
arcuata, inferne oblique truncata, infra truncaturam sinuata. 
Longit. 16 millim., diam. ; apertura 6^ longa, 4 lata. 
Var . major. Testa pallidior, anfr. 8, secundo et tertio costis quam in 
forma typica magis numerosis. 
Longit. 18 millim., diam. 8| ; apertura 7 longa, 4| lata. 
Hab . On the plains within 50 miles of Mamboia; also at 
an elevation of 4000 to 5000 feet ( Last ). 
The columella is not so suddenly truncate as in typical 
Ann. & Mag. N. Hist , Ser. 6. Vol. vi. 12 
