36 ACHATINA, EAST AFRICA. 



oblong, the lip rather solid. Length 4.1, diam. 2.1 inch 

 (Eve.). 



East Africa: Zanzibar (Cuming coll.). 



Ackatina lactea REEVE, P. Z. S., 1842, p. 55 ; Conch. Syst, 

 ii, p. 86, pi. 177, f. 6; Conch. Icon., v, pi. 12, f. 41. PFR., 

 Monogr., ii, p. 252. MARTENS, Moll. D. O.-Af., p. 82. 



Compared with young shells of A. reticulata of the same 

 size, this species is seen to widen more rapidly, has more 

 strongly convex whorls, the mouth being therefore wider. 

 The sculpture is similar, but the spiral furrows reach less 

 deeply downwards, not to the following suture on the penult, 

 whorl, and on the last, hardly the half of its height. There 

 is no trace of brown markings (Martens) . Pfeiffer gives the 

 length as 113, width 54, apert. 53 mm. 



35. A. BLOYETI Bourguignat. 



Shell elongate, but nevertheless relatively tumid, opaque, 

 rather glossy, the upper whorls smooth, the rest striate, the last 

 whorl coarsely striate-lamellose ; whitish, with reddish-chest- 

 nut flames. Spire long-acuminate, rather acute at the sum- 

 mit. Whorls 7 to 8, convex, regularly increasing, parted by 

 an impressed suture, the penult, whorl notably swollen to- 

 wards the right. Last whorl convex-oblong, rounded at the 

 aperture, not half the length of the shell, slowly descending 

 in front. Aperture slightly oblique, lunate, irregularly ovate, 

 rounded outwardly. Columella straight, abruptly truncated, 

 not descending at the base. Peristome unexpanded, acute, 

 the parietal callous white. Length 105, diam. 53, aperture 

 51x31 mm. (Bgt.). 



Ussagara, in the neighborhood of Kondoa (Capt. Bloyet). 



A. Uoyeti BGT., Moll, de TAfrique Equal, p. 82 (1889). 



Remarkable for the acuminate spire, relatively very convex 

 whorls, notably the penultimate whorl, as well as the last 

 whorl, strongly swollen, rounded on the right side. This 

 gives the suture between the two whorls a very conspicuous 

 concavity. The columella descends straightly to a truncation 

 well in front of the base of the aperture. Known only by 

 Bourguignat 's description. 



