164 
Mr. E. A. Smith on Land - and 
longit. totius ± adaequans ; perist. sublate expansum, album, 
marginibus callo tenui junctis. 
Longit. 6 millim., diam. 3 ; apertura 2 longa, 1| lata. 
Hab . Hkata {Emin). 
The teeth in the aperture are almost equidistant from one 
another. One is on the columella, one exactly opposite on 
the outer lip, one (the smallest) at the base of the aperture, 
and the fourth, which is lamellar, curved, and hollowed out 
on the right side, joins the termination of the labrum. 
Ennea cenigmatica. (PI. YI. fig. 11.) 
Testa parva, brevis, pupiformis, supra conoidalis, perforata, parum 
nitida, alba ; anfract. 8, lente crescentes, convexiusculi, angusti, 
costellis numerosis leviter obliquis et arcuatis instructi, sutura 
profunda sejuncti, ultimus antice vix ascendens, utrinque et infra 
labrum valde scrobiculatus et distortus ; apertura parva, insigniter 
plicata, contorta ; perist. solutum, continuum, tenue, dilatatuxn, 
maxime irregulare, dextrorsum sinuatum, siphonatum, album. 
Longit. 4| millim., diam. 3 ; apertura 1^ longa et lata. 
Hab. Mamboia, at an altitude of 4000 to 5000 feet {Last). 
The aperture of this little shell exhibits such distortions, 
plications, and wrinklings that the orifice is almost closed ; 
indeed it seems impossible to convey in words any adequate 
idea of it. 
Ennea soror. (PI. YI. fig. 12.) 
Testa parva, anguste perforata, pupiformis, superne conoidea, sub- 
pellucido-albida, parum nitida ; anfract. 7, convexiusculi, apicales 
leeves, caeteri tenuiter oblique et confertim costulati, sutura sub- 
profunda, crenulata, haud obliqua, sejuncti, ultimus antice con- 
strictus, utrinque et infra aperturam valde scrobiculatus ; aper- 
tura parva, longit. totius ^ adaequans, ringens, dentibus sex 
albis, valde inaequalibus, instructa ; perist. undique expansum et 
reflexum, album. 
Longit. 5 millim., diam. 2§ ; apertura 1| longa, 1 J lata. 
Hab. Same as that of E. cenigmatica. 
The teeth in the aperture are disposed as follows : — A small 
denticle on the columella, a larger prominence behind it 
further within the aperture, a thin curved lamellar tooth on 
the body-wall at the junction of the labrum with the whorl, 
a very large one on the middle of the outer lip with a very 
minute one above it or, it might be said, adjoining it, and the 
sixth, which is also a very small denticle, situated between 
the large one on the outer lip and the smaller one on the 
columella. The pits on the last whorl outside the aperture 
