20 ACHATINA, WEST AFRICA. 



vex, most minutely granulate, the last three horizontally 

 flattened below the sutures, then a little convex; last whorl 

 very large, rudely and closely granose-plicate, much longer 

 than the spire. Columella thick, white, lightly arcuate, ob- 

 liquely truncate above the base of the aperture. Aperture 

 ample, subvertical, sinuate-oval, milk-white within; peri- 

 stome obtuse, unexpanded, brown-edged outside, the outer 

 margin shortly sinuous above, joined to the other by a wide, 

 thick, whitish parietal callous. Length 142, diam. 65 mm. 

 (Morel). 



West Africa: Country of the Selles, in the interior of the 

 district of Novo Redondo, Benguela (Welwitsch). 



Achatina monetaria MOREL., Voy. Welwitsch, Moll., pp. 

 47, 63, pi. 8, f. 2 (1868). PFR., Monogr., viii, p. 272. 



Described from one shell, which had been denuded in large 

 part of its cuticle. The latter appeared to have been fawn- 

 colored, with some darker longitudinal lines. The shell is 

 remarkable for the terraced or somewhat scalariform shape 

 of the spire, which, however, may be pathologic. The lip is 

 thick and the interior milk-white. 



The natives of Benguela cut these shells into beads, which 

 when pierced and strung are used as money; known to the 

 Portuguese under the name quirandas de Dongo. They also 

 serve the purpose of personal adornment of the fair sex. 

 Achatina balteata Reeve is still more widely put to the 

 same uses. 



15. A. BAYAONA Morelet. PL 3, figs. 17, 18, 19. 



Shell ovate, ventricose, thin, rufous or greenish-fulvous, 

 streaked with darker, with an oily lustre. Spire submamil- 

 late with acute apex, flammulate with red. Whorls 8%, con- 

 vex, granulated to the periphery of the last, which is ven- 

 tricose, rugulose striated, and longer than or rarely equalling 

 the spire. Columella straight, arcuate anteriorly, abruptly 

 truncate at the base. Aperture elliptic-oval, pearly within, 

 the peristome unexpanded, thin, margins joined by a super- 

 ficial callous. Length 74, diam. 40 mm. (Morel.). 



West Africa: District of the Due de Braganza, Angola; 



