MICROSTELE. 149 



moreover, it lacks the nodulous denticle which in the present 

 species is replaced by an erect white denticle situate low 

 down on the parietal wall well within the aperture, axid a 

 smaller erect squarish denticle on the columella, also situate 

 well within the opening. Alt. 3.5, diam. maj. 1.75 mm.; 

 aperture: alt. .75, diam. nearly .75 mm. (Preston). 



British East Africa: Eusso Nyiro (Robin Kemp). 



Leucochiloides iredalei PRESTON, Proc. Zool. Soc. London, 

 1912, p. 188, pi. 31, f. 18. 



No palatal tooth is present in this species. Preston's figure 

 is reproduced in pi. 14, fig. 18. The aperture of a topotype, 

 110. 41593 B. Walker coll., is drawn in pi. 17, fig. 7. Both 

 parietal and columellar lamellae are well developed, the for- 

 mer straight and entering rather deeply. There is also a 

 distinct though small and rather short angular lamella. It is 

 deeply riniate and narrowly perforate. 



I have not been able to compare M. oblonga Bttg., which, 

 appears nearly related. 



3. MICROSTELE OBLONGA (Boettger). PL 14, fig. 17. 



Differs from L, (Microstele) noltei (Bttg.), which is near, 

 by the somewhat smaller shell, perforate, oblong-fusiform, of 

 a bay color, the spire convexly oblong. Whorls 51/2, more 

 convex, separated by a more impressed suture, the last equal- 

 ling one-third the alt. of the shell. Aperture 3-toothed, the 

 angular tubercle more distinct, parietal tooth pliciform, not 

 so high, columellar strong, palatals wanting; margins of the 

 peristome connected by a more distinct callus. Alt. 3*4, diam. 

 li/2 mm.; aperture alt. and width 1 mm. (Bttg.}. 



Southwest Africa, Damaraland: 140 km. inward from the 

 mouth of the Swakop, in southwestern Hereroland, one living 

 specimen collected by Dr. Franz Rintelen, Boettger collection. 



Leucochiloides (Microstele) oblongus BTTG., Abhandl. 

 Senckenb. Nat. Ges., xxxii, 1910, p. 445, pi. 28, f. lla, &. 



It is with a certain reserve that I make this form a species 

 distinct from L. (M.) noltei. My decision was taken from 

 the diverse oblong-fusiform instead of cylindric-turrited 

 shape, which is conspicuously shorter and more compressed, 



