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, iiitida, pellucido-subvirescens ; anfract. 

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

 sejuncti, ultimus elongatus, cylindraceus ; apertura elongata, 

 angusta, longit. totius ^ suboequans ; labrum tenue, prorsum 

 curvatum; columella fere perpendicularis, anguste expansa et 

 reflexa. 



Longit. 10| millim., diam. 3; apertura 3 longa, 1| lata. 



Ilab. 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. 



Strej)taxis mamhoiensis. (PI. VI. fig. 1.) 



Testa oblique ovata, umbilicata, parum distorta, alba, nitida ; an- 

 fract. 6, couvexiusculi, celeriter crescentes, peroblique arcuatim 

 striati, superne ad suturam profundam crenulati, ultimus Isevior, 

 obliquus, antice leviter ascendens ; apertura flavescens, antice 

 late curvata, longit. totius | a;quans ; labrum prope suturam 

 sinuatum, baud refiexum, 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. 



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 lirge ; 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 breviter ascendens ; apertura parva, alba, longit. 

 totius -| adsequaus ; perist. angustissime reflexum, marginibus 

 callo tenui junctis, columellari paulo latiore. 



Longit. 6i miUim., diam. 4 ; apertura 2^ longa, 2 lata. 



Hah. Mamboia, at 4000 to 5000 feet elevation {Last). 



In young specimens the umbilicus is moderately broad and 

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

 Hyalinia. 





