I 



411 



Found on rocks in the St. Paulo River near Bavia, Liberia. — Noch nicht 

 abgebildet und mir nicht zugänglich geworden. 



260. Vivipara henzadensis Pilsbry. 



Shell umbilicate, broadly ovate-conic, olive green with some narrow slightly darker 

 streaks; surface glossy and smooth, under a lens showing fine delicate and spaced spiral 

 Striae, which become crowded and somewhat granulöse at the base. Spire short, obtuse, the 

 earher whorls eroded, the eroded portion reddish, tipped with black. Sutures deeply im- 

 pressed, the whorls strongly swollen just below them ; last whorl angular at the periphery 

 in front, the angle disappearing in the last half whorl, which is rounded; umbilicus narrow- 

 excavated behind the columellar hp, surrounded by an angle. Aperture oblique, rounded, 

 ovate, bluish white inside; peristome narrowly expanded at the edge; blunt, black, with a 

 blackish border inside and out, continuous across the parietal margin. — Operculum chestnut- 

 brown and slightly wrinkied outside, with a conspicuous raised or reflexed border, inside 

 with a conspicuousiy raised and minutely roughened ovate area nearer the columellar side 

 radiating Striae on the outside of this area, and a raised border all around. — Pilsbry. 



Alt. 23, diam. 16,.5— 17,5 mm. 



Vivipara henzadensis Pilsbry, in: Proc. Acad. Philadelphia 1901 p. 188 

 t. 5 fig. 1. 



„This species closely resembles V. heliciformis Ffld. in form and colour. It 

 belongs howewer to a group of south-eastern Asia, in which the operculum is pecu- 

 iarly modified, as described above. This subgeneric group I propose to call Idio- 

 poma, the above described species being the type." 



Ich habe oben bei Vivipara variata und deren Unterformen auf den eigen- 

 tümlichen Deckel aufmerksam gemacht, der diese ganze Formengruppe zu Idiopoma 

 Psbry verweist, habe aber damals die Pilsbry'scbe Art übersehen. 



261. Vivipara slianensis Theobald. 



Taf. 77. Fig, 4. 5. 



Testa exumbilicata, ovato-conica, solida, crassa, oblique striata, in anfractibus inferis 

 spiraliter et peculiariter costata, costis nodosis, nitida, virescenti-fusca, subunicolor vel sub- 

 nigro trifasciata. Spira elata, apice acuto, niuro; sutura distincta, inter anfractus inferos 



52* 



