ACHATINA, WEST AFRICA. 15 



trict whence it came, since it is sold in the markets and 

 largely eaten by the natives." 



This form seems to be very similar to A. schinziana Mouss., 

 but the figure differs in showing a longer aperture and wider 

 columella. 



7. A. SEMISCULPTA Pfeiffer. PI. 10, figs. 27, 28, 29. 



Shell ovate-elongate, thin, longitudinally regularly striate. 

 Brownish-white, painted with lightning-like reddish streaks. 

 Spire conic, the apex rather obtuse, regularly granulose with 

 close concentric lines. Whorls iy 2 , a little convex, the last 

 about equal to the spire, decussate by distant impressed lines 

 as far as the periphery. Columella nearly straight, abruptly 

 truncate. Aperture oval-acute; peristome simple, unex- 

 panded. 



Length 58, diam. 28, aperture 30x16 mm. (Pfr.). 



Length 55, diam. 23 mm. (Pfr., type). 



West Africa: Loanda (Cuming coll.) ; Benguela (Dr. 

 Tarns) ; sandy thickets of the district of Mossamedes, near 

 Girdul, Benguela (Dr. Welwitsch). 



A. semisculpta PFR., Proc. Zool. Soc. Lond., 1845, p. 74 

 (Oct., 1845) ; Conchyl. Cab., p. 331, pi. 28, f. 2, 3, and var., 

 pi. 44, f. 6; Monogr., ii, p. 255; iii, 487; iv, 603; vi, 216. 

 DKB., Zeitsch. f . Mai., Nov., 1845, p. 163 ; Index MoU. Guin. 

 Inf., p. 7, pi. 1, f. 41, 42. REEVE, Conch. Icon., v, pi. 11, 

 f. 37. MOBELET, Yoy. Welwitsch, p. 70. 



This species, like A. pfeifferi, belongs to the sandy shore 

 zone. It was described from Cuming 's collection, and Reeve 

 remarks that all of Mr. Cuming 's examples "are distin- 

 guished by the same broken, interrupted style of painting." 

 Fig. 29 is one of these specimens, after Reeve. 



Pfeiffer describes a variety as larger, white, longitudinally 

 streaked with fulvous; length 75, diam. 34 mm., from the 

 Cuming coll. 



8. A. PERFECTA Morelet. PL 4, fig. 26. 



Shell ovate-elongate, thin, translucent, beautifully gran- 

 ulate, the granulation evanescent below the periphery, glossy 

 fulvous, longitudinally painted with reddish sinuous and 



