FTJLTON : AMPHIDKOMUS DAXJTZENBEEGI, N.SP. 303 



conspicuous close-set, oblique striee ; whorls 6 J, convex ; aperture 

 semi-ovate, erect ; peristome slightly expanded, white ; parietal wall 

 with a small tooth or callosity.' Alt. 24, diam. maj. 15 mm. 



Mob. — Unknown. 



Of this fine and distinct new form two specimens are before me. 

 The nearest species known to me are the two East African ones 

 S. Mamhoiensis and Kihive%iensis of E. A. Smith. These, however, 

 are readily distinguished by their much smaller dimensions, being but 

 little more than half the size of the present form. 



3. Amphideomus DATJTZENBEEGr, u.sp. Fig. III. 



Shell dextral, oblong-conic, very narrowly umbilicated, slightly 

 polished, of moderate solidity, whitish above, changing to greenish- 

 yellow below, obscurely spirally striated ; suture of last whorl 

 slightly impressed and bordered by a narrow white band ; whorls 6J, 

 the last obtusely angulated above the aperture at the periphery, last 

 half indistinctly mall eated; aperture semi-oval, white within; peristome 

 moderately expanded, white, margins joined by a very thin callus; 

 columella almost erect, rounded, widening at point of insertion. 

 Alt. 42, diam. maj. 21 mm. 



^«^.— Tonkin. 



A single specimen only of this distinct new form, received with 

 other shells from Tonkin. I have much pleasure in naming this 

 species in honour of M. Ph. Dautzenberg. 



