PUPOIDES, WEST AFRICA. 137 



of cccnopietus, figuring the form from Bakel, which is more 

 obese than the Goree Island specimens. One of the Bakel lot 

 received from Dautzenberg measures: length 5.15, diam. 2.8, 

 length of aperture 2.45 mm.; 5% whorls (pi. 13, fig. 14). As 

 the cccnopietus group has been split up elsewhere, these shells 

 would be a distinct species, or perhaps referable to lardeus 

 Pfr. ; but I am inclined to believe that slender and more 

 obese mutations may occur in all the local races. 



Bulimus putillus Shuttleworth. - - Shell rimate-perf orate, 

 fusiform-oblong, very finely obliquely striatulate, reddish, a 

 little glossy. Spire long-conic, the apex obtuse. Whorls 6, 

 convex, the last scarcely one-third the length. Aperture oval, 

 slightly oblique, having a punctiform tubercle on the penult 

 whorl near the junction of the right margin of the peristome ; 

 peristome broadly expanded, very much callously thickened, 

 brownish, the right margin strongly curved. Length 5.5 to 6, 

 diam. 2.25, aperture 1.5 mm. long. Very abundant on Goree 

 Island, Verreaux (Shutt.). 



21. PUPOIDES GEMMULA (Benson). 



Shell rimate-perforate, ovate-conic, striatulate, glossy, cor- 

 neous. Spire conic, suture impressed, apex rather obtuse. 

 Whorls 5, the last subangularly compressed at the base around 

 the umbilicus. Aperture rounded-oval, provided with a 

 scarcely noticeable subangular tubercle, peristome somewhat 

 expanded throughout, thin, acute, the right margin arcuate. 

 Length 2%, diam. \% mm. (Benson). 



Length 3 to 4.5 mm. (Dohrn.). 



Cape Verde Is.: S. Vicente (Layard) ; S. Antao, S. Vicente, 

 S. Nicolao, S. lago (Dohrn) ; Fogo and Brava (Wollaston). 



Bulimus gemmula BENS., Ann. Mag. N. H. (2), xviii, 1856, 

 p. 434. PFR., Monogr., iv, p. 415. WOLLASTON, Testacea At- 

 lantica, 1878, p. 508. --Buliminus gemmula Benson, DOHRN, 

 Malak. Blatter, xvi, 1869, p. 10. Pupoides gemmida KOBELT, 

 Conchyl.-Cab., Buliminidas, p. 970. 



It differs from the nearly related B. senegalensis Morelet 

 by the smaller size, compression of the whorls and the pro- 

 portion of the last to the length of the shell, according to 

 Dohrn, who found the dimensions to vary from 3 to 4y 2 mm. 

 long. 



