Alt. 



Diam. 



A p. length 



70.5 



33 



34.5 



70 



35 



37 



81 ' 



38 



37 



299 



Apex smooth, obtuse; succeeding whorls slightly convex, the first four 

 slowly increasing, the fifth and final body whorl rapidly increasing down- 

 ward. Suture somewhat impressed especially on the body whorl. From the 

 second whorl, following the nuclear whorl to the termination of the body 

 whorl or the aperture, shell entirely covered by axial striae, some deeper than 

 others, and intersected at all points by rows of spiral granulations. Whorls 

 6-6^. 



Aperture elongate-ovate. Outer and basal margins rather expanded down- 

 ward, the expansion being most marked in adult specimens at the base. 



Parietal region covered by -rather thin, almost transparent callus. Columella 

 long, folded, bluntly truncated, and, when the shell is viewed from the left 

 side, bent backwards to conform with the expansion of the basal margin. 



The shell differs from Achatina and Limicolaria in shape, chiefly as regards 

 the expanded margin of the aperture, a feature peculiar only to parts of the 

 genus Archachalina. It is rather more cylindrical than Achatina, which is 

 usually elongate-ovate. 



Ap. width 



16.5 mm. Holotype, M. C. Z. no. 58934 

 20 Paratype, M. C. Z. no. 58935 



19.5 Paratype, M. C. Z. no. 58935 



Holotype. — M. C. Z. no. 58934; collected in 1926 by Arthur Loveridge, at 

 Bagilo, Uluguru Mts., Tanganyika Territory, Africa. 



Achatina madaziniana, sp. nov. 

 Plate 16, fig. B. 



Description. — Shell acutely ovate, imperforate, rather thin but strong. 

 Nuclear whorl pinkish buff. All following whorls as far as body whorl having 

 pinkish buff ground color. Beginning at second whorl from nuclear whorl 

 and continuing to edge of aperture surface covered with rather straight, 

 longitudinal, liver brown flames set apart at irregular intervals from each 

 other, but tending to fuse together on the last fifth of the body whorl. Ground 

 color of body whorl, cinnamon buff. 



Nuclear whorl smooth, slightly flattened. Beginning at the second whorl 

 from the nuclear whorl and continuing to the aperture, surface covered with 

 axial striae at first light, but on the body whorl becoming rather definite 

 growth lines. 



These striae and growth lines are intersected over most of the surface by 

 spiral lines set apart at rather irregular distances. These lines are obsolescent 

 on the lower half of body whorl. From fourth whorl from apex to edge of 

 aperture there is a series of rough subsutural folds. Whorls 7. 



Aperture acutely ovate. Interior trans'ucent, showing the color pattern 

 of exterior. Outer and basal margins very sharp. Columella long, almost 



'Apex of this specimen broken and worn. 



