28 ACHATINA, WEST AFRICA. 



A species of long, slender contour and dark coloration. 

 Spiral striae are wholly wanting in some individuals, and 

 when present they rarely pass beyond the penult, whorl. 



25. A. SYLVATICA Putzeys. PI. 17, figs. 14, 15, 16. 



Shell ovate, rather thin, pale buff irregularly marked with 

 dark chestnut stripes, narrow and often broken on the spire, 

 obsolete on the upper whorls, but on the last whorl broad 

 and dark, confluent at the base, the suture margined below 

 with chestnut. Surface of the last whorl smooth, but the in- 

 termediate whorls of the spire are finely decussate- granulate 

 below the sutures. Whorls 6%, the first 2% smooth, more 

 or less worn and in fully adult shells sometimes truncate. 

 Aperture ovate, milk-white within, but showing the dark 

 markings more or less distinctly. Columella subvertical, nar- 

 row, brownish, obliquely truncate; lip thin, narrowly dark- 

 edged; parietal callous thin, transparent. Length 33, diam. 

 17, aperture 17 mm. 



Congo Free State: Forest of Musungu Kifuluka below 

 Nyangwe, zone of Manyema. 



Achatina sylvatica PUTZEYS, Bull, des Seances, Roy. Soc. 

 Malac. Belg., 1898, p. Ixxxiii, f. 19. (Not of Pfr. or Desh. 

 = Stenogyra.) 



A handsome little species, chiefly remarkable for its smooth- 

 ness and the broad, basally confluent brown stripes of the 

 last whorl. Fig. 16 is a copy of the original figure. 



26. A. CAPELLOI Furtado. PL 39, figs. 34, 35. 



Shell oval, elongate, turriculate, solid, quite glossy, orna- 

 mented with quite regular spiral and longitudinal striae, 

 crossing at right angles, producing the granulose surface well 

 known in certain species of the genus, but in this one of an 

 extreme delicacy, especially on the upper part of the spire. 

 From the seventh whorl the striae gradually lose their fine- 

 ness and regularity, and finally are wholly replaced by strong 

 growth striae on the lower half of the last whorl. Whorls 9, 

 elegantly convex and slowly increasing, the summit obtuse; 

 suture quite well marked, whitish, strongly plicate and sub- 



