N A NINA. 23 



streaks, dark banded below the periphery, and deeply spirally 

 grooved ; whorls 4^, the last angulated on the periphen\ 



Diam. 60, alt. 30 mill. 



Isl. Mindoro, Philippines. 



Is possibly an extreme variety of the preceding species. 



X. URANUS, Pfr. PL 1 1 , fig. 45. 



Perforation covered, closely slightly striate, with unequal 

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

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



Ins. Polillo, Philippines. 

 X, 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. 



X. Mackenxiana, Souleyet,and N. Balesteriana, Lea. are both 

 s mistral shells, and the former has been placed by me in the 

 syiionyn^ of Ariophanta .la nun; but Pfeiffer considers them 

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

 said to be botli dcxtral 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. 



Moderate!}' 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. 1 1 mill. 



Celebes. 

 N. PERNOBILIS, Fer. PL 8, fig. 2s. 



Umbilicated. smooth, rather thin, decussately striate, and 

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

 well-impressed, periphery subangulate ; interior bluish white. 



Diam. i>5, alt. 42 mill. 



Siam. 



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

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

 3 



