PERIDERIOPSIS. 2-13 



Nsendwe, on the lower side of banana leaves (Dupuis). 

 Figured from a topotype. 



16. Var. albida D. et P. 



The pattern of coloration is the same as in the preceding 

 variety, but the colors differ. The lower part of the last 

 whorl is dirty yellowish; above on the last and preceding 

 whorls the spots or flames are roseate or rose-brown on a 

 whitish ground; the summit is roseate. Dimensions as in 

 the preceding, with which it occurs. 



Ic. Var. LOWAENSIS D. et P. 



In this variety the shell is not quite so thick as in the pre- 

 ceding, and the coloration is extremely variable. The ground 

 is ordinarily gray-white, the summit rose. The whorls of 

 the spire are sometimes ornamented with transverse flames 

 and patches very variable in color and appearance, and some- 

 times girt with a blackish brown band at the suture; but 

 it is readily distinguished from other varieties in always 

 having on the last whorl a rounded patch of greater or less 

 extent at the columella, and 3 quite distinct colored spiral 

 zones on the lower part of this whorl, a lighter zone between 

 two darker ones. Albinistic forms occur. Length 37, diam. 

 16, length apert. 15, width 9 mm. 



Congo Free State : A ravine facing the mouth of the Lowa 

 river (P. Dupuis). 



We also refer to this race a specimen procured at Gongo- 

 Kitete, of a red-orange color, with a brown tract at the colu- 

 mella, a narrow band of deeper orange along the angle of 

 the last whorl, with the suture whitish, and with irregular 

 whitish spots on the upper part of the whorls of the spire 

 (D. & P.}. 



2. P. FORMOSA Dupuis et Putzeys. PI. 17, figs. 80, 81. 



Shell elongate-ovate, a little shining, rather solid, covered 

 with a pale brown epidermis. Upper whorls generally orna- 

 mented with transverse brown flames; following whorls with 

 a more or less wide black-chestnut zone at the upper part, 

 interrupted with zigzag white flames, which are generally 



