the South-African Stenogyrinas. 253 



Krauss further remarks that B. linearis is near akin to 

 B. turriformis, but " is much narrower and longer in propor- 

 tion ; almost cylindriform ; plainly striated; has 10 whorls 

 and a less elongated aperture. The strias, which are only 

 visible under a lens, and the outer lip are curved." 



The cotype, kindly shown me by Dr. Thee!, from the 

 Stockholm Museum, is elongate, narrowly rimate, olivaceous, 

 thin, almost transparent, not very glossy. Spire produced, 

 very slowly tapering, outline a little swollen about the fifth 

 whorl. Apex rounded. Whorls 8, somewhat convex, gradu- 

 ally increasing after the first, which is very small and rather 

 mamillate ; all except the first two plainly covered with fine, 

 regular, curved striae. Suture clearly defined, not at all fili- 

 form. Aperture ovate, rather flattened at base. Peristome 

 simple, acute. Outer lip slightly curved outwards, arched 

 forward. Columella straight, margin very narrowly flatly 

 reflexed over the small rima, which it almost conceals. 



Shell 11'2 mm. long., 3*0 lat. ; aperture 3'3xl"3mm.; 

 last whorl 5 mm. 



The shell is full of ego-*. 



A small species, which might be better placed in Opeas ; 

 clearly differing from E. crystallina, M. & P., of Natal in its 

 duller texture, more convex whorls, and almost fusiform 

 contour ; while E. pietersburgensis, Preston, appears to have 

 more convex whorls and a shorter aperture. 



Unfortunately there exists some doubt as to the exact 

 whereabouts of the sole locality quoted by Krauss and 

 Pfeiffer for this species — Mount Mohapaani, — which Krauss 

 describes as being "beyond the Quathlamba" (or Drakens- 

 berg) ; " on the B,. Limpopo " ; and " deep in the interior." 

 The nearest modern equivalent to Krauss's name is Mopani 

 or Mokoro, a station on the Buluwayo line just south of the 

 Lotsani K,., a tributary of the Limpopo, doubtless deriving its 

 name from the quantities of the rather unjustly ill-famed 

 mopani tree which abounds in the neighbourhood. Dr. Thee] 

 however, very kindly informs me that " Wahlberg in his own 

 journal writes Mount Mokopoani, alternating with Moko- 

 paani," in which case its modern name appears more likely 

 to be Makapan, occurring more than once in the district 

 between Pretoria and Pietersburg, and including Makapans- 

 poort, near Pietpotgietersrust, where a party of Boer vor- 

 trekkers were entrapped by the native chiefs Mapela and 

 Makapan in 1852, and Hermans Potgieter, their leader, flayed 

 alive after all his companions had been killed. 



Whichever be the true habitat of E. linearis, it is in the 

 highest degree unlikely to have spread from its northern 



