160 Mr. E. A. Smith on Land- and 



Stenogyra [Opeas] stenostoma. (PL V. fig. 20.) 



Testa anguste rimata, clongata, gracilis, superne attenuata, ad 

 apicem obtusa, rotundata, uitida, pellucid o-subvirescens ; anfract. 

 8, leviter couvexi, striis incrementi arcuatis sculpti, sutura oblique 

 sejuncti, ultimus elongatus, cylindraceus ; apertura elongata, 

 angusta, longit, tolius 4 subaequans ; labrum tenue, prorsum 

 curvatum ; columella fere perpendicularis, anguste expansa et 

 reflesa. 



Longit. 10|^ miUim., diam. 3 ; apertura 3 longa, \\ lata. 



Hah. Mamboia, at an altitude of 4000 to 5000 feet [Last). 

 This species has a loiif^ Lodj-whorl and aperture, recalling 

 to mind the little Cecilianella acicula. 



Streptaxis mamboiensis. (PI. 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 | a?quans ; labrum prope suturam 

 einuatum, baud refloxum, inferne paulo expansum, obliquum ; 

 columella flavescens, late dilatata et rellexa, callo flavescente lato 

 sutura) juncta. 



Longit. 18 millim., diam. 14 ; apertura 9 longa, 7 lata. 



Hah. Mamboia, at an altitude of 4000 to 5000 feet [Last). 



The sutural line is very prettily denticulated by the ends of 

 the oblique curved lira; ; these are almost obsolete on the 

 body-whorl above the umbilicus and aperture. 



Streptaxis ordinarius. (PI. VI. figs. 2, 2 a.) 



Testa parva, clauso-rimata, valde distorta, polita, dilute viridi-alba ; 

 anfract. G, ad suturam crenulati, superiores regulares, peroblique 

 tenuitcr striati, hie illic lincis obliqiiissaturatioribuspicti, ultimus 

 la^vis, obliquus, antice angustatus, supra aperturam subplanulatus, 

 prope labrum breviter ascendeus ; apertura parva, alba, longit. 

 totius 1 adtrsquaus ; perist. angustissimo rotlexum, marginibus 

 callo tcnui junctis, columcUari paulo latioro. 



Longit. C| millim., diam. 4 ; apertura '2^ longa, 2 lata. 



llab. Mamboia, at 4000 to 5000 feet elevation [Last). 



In young sjiiccinicns the umbilicus is moderately broad and 

 pervious to the apex, and the shell looks rather like a small 

 Hyalinia. 



