132 PUPOIDES, AFRICA. 



13a, Bulimus cerealis Paladilhe (pi. 13, fig. 7). --Shell 

 rimate-perf orate, rather long subovate, corneous- whitish or 

 brownish, slightly striatulate ; spire rather long conoid, apex 

 somewhat obtuse. Whorls 6y 2 , rather convex, rapidly in- 

 creasing, parted by an impressed suture; last whorl a little 

 larger than the penult, about % of the length at the aperture, 

 strongly ascending at the insertion; free margin a little ex- 

 cavated, oblique. Aperture rounded-subovate, somewhat ob- 

 lique; parietal margin usually unarmed, sometimes provided 

 with a fold. Peristome simple, shortly reflected; outer 

 margin a little arcuate, columellar dilated, reflected over the 

 umbilical crevice. Length 4, diam. 2 nun. Aden (Issel). 

 (Bulimus cerealis PALADILHE, Ann. Mus. Civ. Geuova, iii. 

 1872, p. 16, pi. 1, f. 22, 23). 



Considered by Bourguignat to be a synonym of P. senna- 

 ariensis (Pfr.). 



136. Bulimus reboitdi Bgt. --Shell perforate, elongate-acu- 

 minate, subconoid, subopaque, buff-corneous, obliquely stri- 

 atulate. Spire elongate, acuminate, apex glossy, smooth, very 

 obtuse, mamillate. Whorls 6, convex, regularly increasing, 

 separated by an impressed suture, the last exactly one-third 

 the length,* rotund, ascending to the insertion of the lip. 

 Aperture vertical, slightly lunate, rotund; peristome strong, 

 flatly expanded and acutely reflected, margins strongly ap- 

 proaching, joined by a thin callus bearing a tooth at the in- 

 sertion of the lip. 'Length 4, diam. 1% mm. Drift of the 

 Oued-Roumana near Bousaada, that is, in the debris of the 

 Oued which comes down from the Sahara of the province of 

 Constantine [Algeria], where it was found by Dr. Eeboud 

 (Bourguignat, Species Novissimee, 1876, p. 24). 



Bourguignat should have indicated how this differs from 

 sennaariensis if there is any difference except in locality. 



13c. Bulimus aefhiopicus Bourguignat. PI. 14, figs. 3, 4- 

 "This Bulimus, remarkable for its deep umbilicus, relatively 

 very open, is especially characterized by having the last 

 whorl produced to the right, a little eccentric to the axis ; the 

 aperture is more rounded and the outer lip more convex than 

 in senaaricus; the last whorl, noticeably subangular around 

 the umbilicus, has a marked ascending direction above. The 

 whorls, 6 in number, are less frankly convex, and the suture 



not so deep. 



"Dr. Jickeli (Moll. N. 0. Afr., pi. 5, f. 1 d and e only) has 



