22 ACHATINA, WEST AFRICA. 



oblong grains formed by more distant spiral lines ; last whorl 

 nearly three-fifths the total length, somewhat wrinkled from 

 suture to periphery and having lightly impressed spiral 

 lines, nearly smooth below the middle. Columella whitish, 

 arcuate, abruptly truncate. Aperture a little oblique, acu- 

 minate-oval, pearly- whitish within; peristome thin, unex- 

 panded, the margins not connected. Length 45, diam. 24, 

 aperture 26x14 mm. (Pfr.). 



Southwest Africa : Damaraland ( Dohrn coll. ) ; Ubeb on 

 the Khan river (A. Schenck). 



Achatina dammarensis PFR., Malak. BL, xvii, 1870, p. 31; 

 Novit. Conch., iv, p. 2, pi. 109, f. 3, 4; Monogr., viii, 274. 

 A. damarensis Pfr., MARTENS, Sitzungsber. Ges. nat. Freunde 

 zu Berlin, 1889, p. 162; Archiv. f. Naturg., Ixiii, i, 1897, 

 p. 40. 



This species has about the shape of A. papyracea Pfr., but 

 is much more nearly related to A. bayaona Morel. It differs 

 from this by the more ovate contour, the last whorl being 

 less contracted below; besides, the columella is much more 

 strongly arched, and the granulation appears much coarser 

 on the penult, whorl and upper half of the last (Pfr.). 



18. A. HORTENSL^ Morelct. PL 6, figs. 7, 8, 9. 



Shell ovate, inflated, thin, pellucid, glossy, granulose- 

 decussate. Brownish-green, streaked lengthwise with brown. 

 Spire acutely conic, short, the suture deep. Whorls 6, con- 

 vex, the last inflated, wrinkle-striate at the base, smooth an- 

 teriorly, more than half the total length. Columella regu- 

 larly arcuate, pallid, abruptly truncate. Aperture oval, 

 opaline within; peristome unexpanded and acute. Length 

 32, diam. 19 mm. (Morel). 



West Africa: district of Huilla, in the province of Ben- 

 guela; between Lopollo and Lake Ivantala, 5,000 ft. elev. 



Achatina hortensice MOREL., Journ. de Conchyl., 1866, p. 

 159; Voy. Welwitsch, p. 74, pi. 4, f. 3. PFR., Monogr., vi, 

 p. 216. 



With the sculpture and coloration of the large Achatinas, 

 this species is remarkable for its small size, fragility and 



