18 ACHATINA, WEST AFRICA. 



places, shorter than the spire. Coluraella bluish-white, 

 arcuate anteriorly, narrowly tapering- truncate. Aperture 

 acuminate-oval, blue within, pearly; peristome unexpanded, 

 thin, brown-bordered, the margins joined by a moderate blu- 

 ish parietal callous. Length 126, diam. 61 mm. 



West Africa: Humid forests of Golongo-Alto, near Sange, 

 and district of the Due de Braganza, Angola (Dr. Wei- 

 wit. sch). 



Achatina welwitschi MOREL., Journ. de Conch., xiv, 1866, 

 p. 156; Voy. Welwitsch, p. 66, pi. 5, f. 2. PFR., Monogr., 

 vi, p. 217. 



Morelet defines two varieties: (1) with the shell thick and 

 ponderous, 9^ whorls, and (2) shorter, more ventricose, 

 blackish-chestnut, thin, with stronger sculpture, found at the 

 cataracts of the Lucala river. It has a whorl less than the 

 type form. 



12. A. DOHRNIANA Pfeiffer. PL 10, figs. 30, 31. 



Shell ovate-conic, solid, ponderous, but little shining, 

 piceous. Spire conic, the apex rather obtuse; suture sub- 

 ma rginate. Whorls 8, slightly convex, the upper smooth, 

 white, the succeeding minutely decussate-granulose, fulvous, 

 indistinctly red-flammulate, the last whorl longer than the 

 spire, irregularly rugulose and minutely granulose to the 

 base, blackish-brown, marked with irregular streaks and spots 

 of grayish-yellow. Columella lightly arcuate, narrowly trun- 

 cate at the base. Aperture subvertical, acuminate-oval, blue 

 a.iid very glossy inside; the peristome simple, brown-mar- 

 gined, the margins joined by a glossy bluish callous spread- 

 ing inwards. Length 125, diam. 56, length of aperture 72, 

 width 36 mm. (P/r.). 



West Africa: Angola (Fr. Rois Batalha). 



A. dolintiana PFR., Malak. Bl., xvii, 1870, p. 29; Novit. 

 Conch., iv, p. 1, pi. 109, f. 1, 2; Monogr., viii, p. 273.- 

 cf. Do 1 1 UN., MSI I. BL, xxi, 1873, p. 79; MORELET, J. de 

 Conchy!., xxi, 1873, p. 327; xxii, 1874, p. 60. 



Dolirn considered this species to be the full-grown stage 

 <)!' .1. /ninth irtnifi Morel., an opinion which Morelet opposed, 



