ACHATINA, WEST AFRICA. 13 



oblong-ovate, rather thin, smooth, white, streaked and light- 

 ning-striped with broad rufous spots, covered with a tawny 

 cuticle. Spire oblong-conic, the apex obtuse, blushing. 

 Whorls 71/2, a little convex, the upper obsoletely granulate, 

 last about four-ninths the length. Columella somewhat 

 twisted, obliquely truncate. Aperture oval, milk-white in- 

 side; peristome simple. Length 80, diam. 35, aperture 38 x 

 21 mm. 



The 'specimen in Brit. Mus., subsequently figured by 

 Reeve, is larger, 116 x 50 mm., apert. 53 mm. (pi. 17, fig. 22). 



The locality was unknown to Reeve, but Pfeiffer, in 1869, 

 received a series from Angola, showing great variation in 

 coloration, size and the subsutural margination. The most 

 constant characters of the series are the long spire, always 

 longer than the aperture, and the complete smoothness of 

 the shell, which barely shows traces of a fine granulation 

 on the upper whorls under a strong lens, while the last whorl 

 can hardly be said to be "obsoletely substriate." Besides 

 the typical form with black-brown flames and bluish colu- 

 mella, there is a form with pale-colored flames, or almost 

 uniform brown-yellow, the columella and parietal callous 

 beautiful rose-red. Shell thicker and heavier throughout. 

 This form Pfeiffer considered to belong to A. tincta as a 

 variety; but it has been separated by Dautzenberg under 

 the name A. oblitterata. 



5. A. OBLITTERATA Dautzenberg. PI. 18, fig. 20; pi. 19, figs. 



24, 25. 



Shell imperforate, ovate-oblong, glossy, rather solid, the 

 spire conoid, turrite, apex a little obtuse. Whorls 8, quite 

 convex, rather regularly obliquely plicate with growth-stride, 

 the suture obsoletely marginate with an impressed line. Last 

 whorl a little shorter than the spire. Aperture ovate, the 

 margins joined by an adnate callous. Columella nearly 

 straight, twisted, narrowly truncate, the lip simple. Color 

 whitish, indistinctly flamed with fulvous streaks, under a 

 buff cuticle. Aperture bluish-white within the throat, the 

 columella and parietal callous vivid rose. Length 95, diam. 

 53, aperture 45x30 mm. (Dautz.). 



