52 ACHATINA, EAST AFRICA. 



lucid, glossy, the upper whorls roseate, the lower three cov- 

 ered with a yellow epidermis, quite fugacious and readily 

 peeling off, darker on the last whorl, streaked towards the 

 apex, elegantly ornamented with fulvous flammules, the 

 median whorls zigzag-flammulate with black-chestnut, con- 

 fluent flames; the last whorl near the aperture chestnut- 

 olivaceous-flammulate. Early whorls smooth, median ones 

 strongly costate, the riblets decussate on the antepenult, and 

 penult, whorls; the last whorl coarsely plicate, plicae obtuse, 

 vanishing or blunted in places, and elegantly plicate around 

 the suture. Spire regularly acuminate, relatively but little 

 produced, the apex roseate, obtuse, submamillate. Whorls 

 8, convex, regularly increasing. Last whorl oblong, ample, 

 more than half the total alt. Aperture slightly oblique, 

 acuminate-oblong, intense blue inside. Columella bluish, 

 nearly straight, slightly twisted, the base abruptly truncate; 

 parietal callous thin, subdiaphanous and bluish. Length 

 117, diam. 57, length of aperture 65, width 30 mm. (Bgt.). 



Zanzibar: environs of Nasimoya (Letourneux). Baga- 

 moyo (Stuhlmann) ; Buloa near Tanga (Eismann) ; Ussam- 

 bara near Nguelo (Rolle) ; Massai Steppe (Langheld), etc., 

 in German East Africa. 



A. zanzibarica BGT., Descript. d. divers esp. Moll, de 

 1'Egypte, etc., p. 5 (1879). MARTENS, Beschalte Weich- 

 thiere, p. 86. Achatina usambarensis ROLLE, Nachrbl. d. D. 

 Malak. Ges., 1895, p. 100 (quoted A. usambarica by Martens). 



The rather strong sculpture, closely crowded fold-striae 

 and more or less spaced, not very numerous spiral grooves, 

 the reddish color of the upper whorls, and the rather fusi- 

 form shape, the greatest breadth in the middle of the last 

 whorl, not dilated sack-like below, are characteristic of this 

 species. The chestnut-brown streaks on a yellow ground are 

 broad though unequal, and often connected by transverse 

 bridges, seldom forked above or decidedly zigzag. The 

 columellar margin is whitish, the interior of the mouth re- 

 markably bluish, with dark stripes showing through (Mart.). 



In A. schweinfurthi the greatest width of the shell is more 

 basal in position. 



