ACHATINA, EAST AFRICA. 55 



East Africa: Kilima-Njaro, in the cultivated zone, very 

 common (G. Volkens). 



A. castanea LAM., An. s. Vert., vi, pt. 2, p. 130 (1822). 

 Helix c., FERUSSAC, Ilistoire Nat. Moll, terr., pi. 125, f. 5. 

 A. castanea Lam., MART., Beschalte Weichthiere, etc., p. 88, 

 lower two figures on p. 87. 



Fig. 8, copied from Ferussac, apparently represents Lam- 

 arck's type. The species has been unknown for many years, 

 but is recognized by Prof, von Martens in a single speci- 

 men from Mt. Kilima-Njaro. This shell agrees well with 

 the original castanea except in being larger (pi. 15, figs. 



7, 9). It is ovate, acuminate above, weakly plicate-striate 

 with spiral grooves, which are rather numerous on the upper 

 whorls, less so on the penult, and last whorls; pale yellow 

 with rather wide, straight, chestnut-brown streaks, but on 

 the upper half of the last whorl uniform chestnut, the lower 

 half lighter yellowish, the colors sharply defined from one 

 another. Interior of the mouth violet-bluish; columellar 

 margin approaching vertical, white, with narrow truncation. 

 Length 97, diam. 50.5, aperture 53 mm. long. 



49. A. FULICA Ferussac. Plates 36 and 37. 



Shell oblong-ovate, thin but rather strong, yellowish, more 

 or less profusely streaked with reddish-brown, the ground 

 becoming white and the markings bolder on the spire, early 

 whorls whitish. Surface glossy, with slight growth-wrinkles 

 but no spiral strice on the last whorl, the median whorls 

 finely and often obsoletely decussate. Whorls usually 7 to 



8, convex, especially the last one. Aperture about half the 

 total length in adult shells, whitish or lilac-tinted within. 

 Columella slightly concave, sigmoid, truncate below, and with 

 the parietal callous, white. 



Length 94, diam. 45, aperture 48 mm. (Calcutta). 

 Length 100, diam. 45, aperture 50 mm. (Mauritius) . 

 Length 86, diam. 44, aperture 43 mm. (Mauritius). 

 Length 108, diam. 51, aperture 54 mm. (Mauritius). 

 Length 123, diam. 60, aperture 63 mm. (Madagascar). 

 Zanzibar, common and generally diffused (Gibbons, Hil- 



