ACHATINA, EAST AFRICA. 59 



50. A. ERLANGERI Mollendorff & Kobelt. 



Shell imperforate, conoidally swollen-oblong, very solid, 

 heavy, indistinctly plicate-striatulate, nearly smooth, rather 

 glossy, white. Spire almost exactly conic, the apex rather 

 acute, glossy, hyaline. Whorls T 1 /^, a little convex, the last 

 large, much longer than the spire, quite convex. Aperture 

 nearly vertical, subauriform, the base somewhat effuse; 

 peristome unexpanded, obtuse; columella rather twisted, ob- 

 liquely strongly truncate. Length 122.5, diam. 68, aperture 

 65.5 mm. long, 41 wide (M. & K.). 



Northeast Africa: Gallaland on the Wabbi river and 

 Ganale, Somaliland (C. v. Erlanger) . 



Achatina erlangeri M. & K., Nachrichtsblatt d. Deutschen 

 Malak. GeselL, xxxiv, p. 180 (Oct., 1902). 



Related, apparently, to A. chrysoleuca, but more solid, 

 with a proportionally smaller aperture. 



51. A. CHRYSOLEUCA Pilsbry. PL 16, fig. 13. 



Shell ovate, with conic spire, in general contour resem- 

 bling A. hamillei, A. petersi, etc. ; moderately solid and 

 strong, though not very thick. White, with a thin golden- 

 brown cuticle, which is deciduous over the greater part of 

 the shell, remaining behind the aperture and in the depres- 

 sions between longitudinal plications elsewhere; later l l / 2 

 whorls immaculate, the next earlier with spaced, somewhat 

 zigzag and rather broad brown streaks, the next earlier 

 narrowly streaked, the streaks straight, these streaked whorls 

 being soiled white. Whorls 6% (the apex truncated, per- 

 haps 1 or 13/2 whorls being thereby lost), moderately con- 

 vex, the last quite convex. Surface shining, the antepenult- 

 imate whorl finely decussate, this sculpture hardly visible 

 to the naked eye, and gradually becoming obsolete, the spirals 

 lost or very weak on the later 1% whorls, which are some- 

 what coarsely, irregularly plicatulate above, obsoletely so 

 below. Sutures even above, weakly and irregularly serrate 

 below. Aperture exceeding half the length of the shell, 

 pure white within, subvertical, acuminate above; outer lip 

 rather regularly arcuate, but less curved above than below, 



