60 ACHATINA, EAST AFRICA. 



thin and acute. Cohimella short, cylindric, very deeply con- 

 cave on the front and the side towards the aperture, abruptly 

 truncated at base, delicate flesh-tinted; parietal wall with 

 a thin, transparent varnish. Length 105, diam. 58 mm.; 

 longest axis of aperture 60, greatest width of cavity 33 mm. 



British East Africa: Tulu Didirko, in about lat. 4 4' 

 N., Ion. 39 36' E.)., at 3,580 ft. alt. (Dr. A. Donaldson 

 Smith, March 27, 1895). Type 68,113, A. N. S. P. 



Achatina chrysoleuca PILS., Proc. A. N. S. Phila., 1897, 

 p. 357 (Nov. 23, 1897). 



An ivory-white shell, inconspicuously marked on the spire, 

 the golden cuticle largely lost from the type specimen, 

 which was collected alive. There is a little prominence at the 

 periphery, and there are some oblique flattened places above 

 it on the last whorl. The columella is very short and sin- 

 uous. A. petersi is a thinner shell than chrysoleuca, differ- 

 ently colored, with finer vertical sculpture and far more 

 spiral grooving on the last whorl. 



Dr. Smith collected also a dead, half-grown shell, appar- 

 ently referable to chrysoleuca, at Magois, British East 

 Africa. The type locality is east from Lake Stefanie. 



52. A. RODATZI Dunker. PL 45, fig. 3. 



Shell elongate, ovate-conic, rather thick, milk-white, cov- 

 ered with a very thin olivaceous-tawny epidermis. Spire 

 conic, nude above, the apex rather acute, the suture light, 

 submarginate, slightly crenulate. Whorls 8%, a little con- 

 vex, longitudinally obsoletely plicate, granose-decussate 

 above, the following whorls more openly reticulate, the 

 last nearly smooth, about as long as the spire. Columella 

 white, slightly arcuate, obliquely and narrowly truncate 

 above the base of the aperture. Aperture subvertical, acu- 

 minate-oval, milk-white within; the parietal callous white, 

 spreading inward. Length 134, diam. 60, aperture 72 x 34 

 mm. (Pfr.y from type). 



Island of Zanzibar (Rodatz, Gibbons). Bagomoyo; on 

 the way from Kikoha to Rosako, in Usaramo, and near Msere 

 on the Wami shore (Stuhlmann). 



