16 ACHATINA, WEST AFRICA. 



waved streaks. Spire long-conic, the suture impressed. 

 Whorls 8, convex, the last a little shorter than the spire. 

 Columella nearly straight, truncate, pale, suffused with violet 

 above. Aperture oblong, semioval, opalescent within, the 

 bands showing through. Peristome unexpanded, thin, brown- 

 edged. Length 87, diam. 28 mm. (Morel.). 



West Africa: district of Pungo-Andongo ; also at Sange, 

 on the rocky hills along the Cuango, Angola (Welwitsch). 



A. perfecta MOREL., Voy. Welwitsch, p. 70, pi. 4, f. 2 

 (1867). PPR., Monogr., viii, p. 276. 



Remarkable for its coloration. 



9. A. SCHINZIANA Mousson. PL 17, fig. 19. 



Shell imperforate, ovate-elongate, thin, strongly striate, 

 less so below, the striae conspicuously granulated by others in 

 a spiral direction. Corneous-buff, painted with wide stripes, 

 sometimes lightning bent. Spire conic, regular, the summit 

 minute, acute, whitish; suture indistinctly crenulate. Whorls 

 8, the nuclear 2 polished, the following ones acutely gran- 

 ulate, a little convex, the last whorl ovate, not inflated, a 

 little longer than the spire, not ascending, nearly smooth 

 beneath. Aperture subvertical (its plane 13 degrees with 

 the axis), acutely long-oval, showing the external stripes 

 within; peristome unexpanded, acute, the margins remote, 

 joined by a very thin parietal callous. Columella slender, 

 strongly twisted and produced, acuminate below, not trun- 

 cate. Length 68, diam. 39 mm. (Mouss.) . 



Southwest Africa : Ondonga, Ovampo-land, in sandy coun- 

 try, but not without vegetation (Dr. H. Schinz). East 

 Africa: Sodanna, in the northeast corner of German East 

 Africa (Dr. Passarge, 1898). Rikatla, Delagoa (Junod). 



A. schinziana Mouss., Journ. de Conchy!., 1887, p. 294, 

 pi. 12, f. 3. v. MART., Conchol. Mittheil., iii, pp. 6, 40; Sitz- 

 ungsber. Ges. nat. Freunde, 1900, 119. GODET, in Junod, 

 Bull. Soc. Vaudoise des Sci. nat, xxxv, 1899, p. 278. 



According to Mousson this species differs from A. fulgur- 

 ata and A. varicosa by the acuteness of the summit and the 

 torsion of the columella, which terminates in a point almost 



