NANINA. 33 



streaks, dark banded below the periphery, and deeply spirally 

 grooved ; whorls 4j, the last angulated on the peripher}-. 



Diam. 60, alt. 80 mill. 



Isl. Mindoro, Philippines. 



Is possibly an extreme variety of the preceding species. 



X. URANUS, Pfr. PL 11, fig. 45. 



Perforation covered, closely slightly striate, with unequal 

 slight concentric striae ; olivaceous brown, whorls 4J, the last 

 strongly angnlated. Diam. 68, alt. 28 mill. 



Ins. Polillo, Philippines. 

 N, MARTINI, Pfr. PI. 10, figs. 43, 47. 



Narrowly umbilicated, rather thin, closely obliquely granularly 

 striate; light chestnut-brown, often tinged with olivaceous on 

 the spire and base ; whorls 7-8, slowly increasing, periphery 

 acutely angulated. Diam. 35-43, alt. 16-21 mill. 



Pedang, Isl. of Sumatra. 



N. Mackensiana, Souleyet,and N. Balesteriaria, Lea, are both 

 sinistral shells, and the former has been placed by me in the 

 synoii3^m3 r of Ariophanta Janus; but Pfeiffer considers them 

 identical with the present species. N. amphidroma , Martens, is 

 said to be both dextral and sinistral ; the dextral form, at least 

 (fig. 47), may be considered a smaller variety of the present 

 species. 



X. RIBBEI, Bottger. Pi. 10, fig. 48. 



Moderately umbilicated, arcuately striate; yellowish brown 

 under a deciduous epidermis ; whorls 5 J, the last not descending, 

 with acutely carinate, plicate periphery, radiately striate on the 

 base; extremities of the lip connected by a parietal callus. 



Diam. 26, alt. 11 mill. 



Celebes. 

 N. PERNOBILIS, Fer. PI. 8, fig. 28. 



Umbilicated, smooth, rather thin, decussately striate, and 

 very slightly malleate ; olivaceous brown ; whorls 5J, suture 

 well-impressed, periphery subaugulate ; interior bluish white. 

 Di.-nn. 65, alt. 42 mill. 



Siam. 



The figure of this species in Ferussac is not recognizable, so 

 that Pfeiffer's identification of it with the Siarn form, as 

 3 



