160 
Mr. E. A. Smith on Land - and 
Stenogyra ( Opeas ) stenostoma. (PL V. fig. 20.) 
Testa anguste rimata, elongata, gracilis, superne attenuata, ad 
apicem obtusa, ro tun data, nitida, pellucid o-subvirescens ; anfract. 
8, leviter convexi, striis increment^ arcuatis sculpti, sutura oblique 
sejuncti, ultimus elongatus, cylindraceus ; apertura elongata, 
angusta, longit. totius f subaequans ; labrum tenue, prorsum 
curvatum ; columella fere perpendicularis, anguste expansa et 
reflexa. 
Longit. 10| millim., diam. 3; apertura 3 longa, 1J lata. 
Hab . Mamboia, at an altitude of 4000 to 5000 feet [Last). 
This species has a long body-whorl and aperture, recalling 
to mind the little Cecilianella acicula. 
Streptaocis mamboiensis . (PL VI. fig. 1.) 
Testa oblique ovata, umbilicata, parum distorta, alba, nitida ; an- 
fract. 6, convexiusculi, celeriter crescentes, peroblique arcuatim 
striati, superne ad suturam profundam crenulati, ultimus laevior, 
obliquus, antice leviter ascendens ; apertura flavescens, antice 
late curvata, longit. totius \ aequans ; labrum prope suturam 
sinuatum, haud reflexum, inferne paulo expansum, obliquum ; 
columella flavescens, late dilatata et reflexa, callo flavescente lato 
suturae juncta. 
Longit. 18 millim., diam. 14 ; apertura 9 longa, 7 lata. 
Hab . Mamboia, at an altitude of 4000 to 5000 feet (Last). 
The sutural line is very prettily denticulated by the ends of 
the oblique curved lirse ; these are almost obsolete on the 
body-whorl above the umbilicus and aperture. 
Streptaxis ordinarius. (PL VI. figs. 2, 2 a .) 
Testa parva, clauso-rimata, valde distorta, polita, dilute viridi-alba ; 
anfract. 6, ad suturam crenulati, superiores regulares, peroblique 
tenuiter striati, hie illic lineis obliquis saturatioribus picti, ultimus 
laevis, obliquus, antice angustatus, supra aperturam subplanulatus, 
prope labrum bre viter ascendens ; apertura parva, alba, longit. 
totius -§• adaequaus ; perist. angustissime reflexum, marginibus 
c^llo tenui junctis, eolumellari paulo latiore. 
Longit. 6| millim., diam. 4 ; apertura 2^ longa, 2 lata. 
Hab . Mamboia, at 4000 to 5000 feet elevation (Last). 
In young specimens the umbilicus is moderately broad ajid 
pervious to the apex, and the shell looks rather like a small 
Hyalinia. 
