30 ACHATINA, WEST AFRICA. 



Group of A. balteata. 

 Shell large and elongate, granulate or decussate throughout. 



28. A. RUGOSA Putzeys. PI. 34, fig. 12 ; pi. 33, figs. 8, 9. 

 Shell rather solid, long-conic, slightly shining, the apex 



obtuse. Whorls 7 to 8, a little convex, usually marginate, 

 the first smooth, then very delicately granulate; the upper 

 whorls roseate, the rest covered with a brown cuticle, some- 

 times irregularly marked with dark chestnut flames, wider 

 above the suture ; the last whorl oblong, somewhat compressed, 

 obscurely banded, regularly grooved with wrinkles of growth 

 and close spiral lines. Aperture oblong, the lip acute, milky- 

 bluish within. Columella variable, margins joined by a very 

 thin bluish callous. Length 130 to 104, diam. 60 to 46, length 

 of aperture 70 to 56 mm. (Putz.) . 



Congo Free State: forest of Micici, zone of Manyema. 



Achatina rugosa PUTZ., Bull, des seances de la Soc. Roy. 

 Malac. de Belgique, 1898, p. Ixxxiii, f . 18. Bull, for 1901, p. Ix. 



This species has some resemblance to A. balteata Rve., but 

 it differs in the sculpture of the last whorl, which is coarsely 

 wrinkled, and covered with a very dense, fine granulation, 

 which on the last whorl is more or less distinctly transformed 

 into a dense, wavy spiral lineolation. The specimens before 

 me (pi. 33, figs. 8, 9) are quite thin and light, and vary in 

 color, one being olivaceous-yellow, marked with broad but 

 indistinct dark red-brown flames, the early whorls pale ros- 

 eate, while the other is clear yellowish-green with some darker 

 streaks, also becoming roseate and narrowly striped above. 

 Length 110, diam. 48, length apert. 59 mm., whorls 8. 



* ' It was first found in the forests of the Wazimba country, 

 on the right bank of the Lualaba, northeast of Nyangwe, 

 but we have since encountered this Achatine on the same side 

 at Musungu Kifuluka, Nsendwe, Lokandu, Ponthierville, and 

 we have received a specimen from Stanley Falls" (D. et P.). 



29. A. BALTEATA Reeve. PL 4, fig. 27. 



Shell acuminately oblong, somewhat fusiform, rather thick. 

 Whorls 8 to 9, slightly plicately striated, very closely min- 



