ACHATINA, EAST AFRICA. 35 



catulate, the foldlets coarsely cut into curved granules and 

 festoons ~by deeply-cut, irregularly-spaced, unequal spiral 

 sulci. Spire slender above, often with the tip truncate and 

 plugged. Whorls 8 (according to Pfr.), 7 in decollate shells, 

 convex. Aperture ovate, white; outer lip regularly arcuate, 

 obtuse, white; columella vertical or concave, abruptly trun- 

 cate, covered with a glossy white callous which extends over 

 the parietal wall. 



Alt. 185, diam. 77, aperture 83 mm. 



Alt. 160, diam. 70, aperture 73 mm. (Pfr., type). 



Alt. 195, diam. 85 mm. (Martens). 



Alt. 195, diam. 80 mm. (Martens). 



Alt. 125, diam. 64 mm., whorls 8-9 (Martens). 



East Africa: Island of Zanzibar, in the calcareous district 

 on the east coast, near Jambiani, by hundreds, on bushes, etc. 

 (Neumann). Lindi Bay and on the Lindi River (Gibbons, 

 Marie). 



A. reticulata PFR., Proc. Zool. Soc. Lond., 1845, p. 74; 

 Monogr., ii, p. 252 ; Conchyl. Cab., p. 326, pi. 27, f . 1 ; Novit. 

 Conch., i, p. 98. DESK, in Fer., Hist., p. 160, pi. 129 

 REEVE, Conch. Icon., v, pi. 2, f. 9. DOHRN, Malak. BL, xxi, 

 p. 180. GIBBONS, Journ. of Conch., ii, p. 143. ANCEY, Bull. 

 Soc. Malac. France, ii, 1885, p. 139. v. MARTENS, Deutsch- 

 Ost-Af., p. 81. 



The most solid, most coarsely sculptured and one of the 

 largest species of the genus. The columella varies from 

 nearly straight and vertical to markedly concave and sinuous. 



Mr. Ancey received a sinistral reticulata from near the 

 Lindi river, in the south of Zanguebar (Bull. Soc. Malac. 

 France, ii, 139). 



34. A. LACTEA Reeve. PL 16, fig. 12. 



Shell oblong-ovate, solid, of a rich uniform cream color 

 both inside and out, covered with a slight, scattered epider- 

 mis. Spire regular, the whorls are very fully striated longi- 

 tudinally, the striae rather irregularly following the growth 

 of the shell, and they are characterized by having a number 

 of fine lines running around the upper half. Aperture sub- 



