PUPILLA, AFRICA. 207 



longer than the upper, as usual. The apical whorl is shallowly 

 pitted, or in places appears weakly, irregularly granulose by 

 running together of the pits. Striation of the later whorls is 

 weak and sparse. 



Length 3.1, diam. ab. apert. 1.65 mm. ; 6 whorls. 



Length 2.9, diam. ab. apert. 1.6 mm. ; 5y 2 whorls. 



Dohrn evidently did not intend the terms brevior and 

 minor as names; he merely numbered the varieties. His 

 typical form is the larger one, about 3 mm. long, drawn in the 

 figure. Wollaston's var. subalutacea is synonymous with this 

 form. 



Dohrn 's "Var. 2 minor: long. 2 1 /s, diam. vix \V mill." is 

 a small race. His "Var. 3 brevior, anfr. 5, convexioribus : 

 long. 2%, diam. 1% mill." is as Wollaston has noted, merely 

 the short form of the typical more elongate race; they "can- 

 not be treated apart, but pass into each other by impercep- 

 tible gradations." 



P. f. gorgonica is probably not really separable from the 

 continental P. fontana, and except for its geographic isolation 

 would scarcely be considered a distinct race. The figured 

 specimens are from Dohrn. 



30a. PUPILLA FONTANA (Krauss). PL 16, figs. 1-23 (17-19 

 typical). 



"Shell small, perforate, ovate-cylindric, obtuse, brownish, 

 pellucid, very finely striolate, silky. Whorls 7, convex. Aper- 

 ture subangular-rounded, yellow; peristome acute, subre- 

 flected, the margins joined by a thin callus; parietal wall 

 having one fold ; three teeth, one on the columella, two in the 

 depth of the right margin, the upper one [error: should be 

 lower one] forming an external scar. Length 1.4, diam. 0.7 

 lines [about 3 : 1.5 mm.] . 



' ' The striation is extremely delicate and gives the surface a 

 slightly silky luster. This species is extremely like the Euro- 

 pean P. triplicata Studer, and differs only by the two teeth in 

 the depth of the right margin, the upper of which forms a 

 little pit outside" (Krauss). 



South Africa, Transvaal: Source of Mooi River (Wahl- 



