NANINA. 39 



X. EXPLANATA, Quoy and G-aimard, PL 13, fig. 69. 



Perforate, thin, closely obliquely striulate, mingled with wider 

 stride, smoother below ; reddish brown, lighter below ; becoming 

 whitish towards the centre ; whorls 6, the last acutely carinated 

 on the periphery, with a narrow chestnut band below. 



Diam. 30, alt. 12 mill. 



New Guinea. 



The N. exilis of Miiller is indeterminable, but Pfeiffer and 

 others have identified it with a shell brought by Cuming from 

 the Philippine Islands, and have included as a synonym N. ex- 

 planata, Quoy and Gaimard. The two species are distinct, 

 although very similar in their characters, as pointed out b} 7 Dr. 

 von Martens. 



N. DIVISA, Forbes. PI. 13, fig. 70. 



Perforate, rather thin, obliquely striate above, obsoletely de- 

 cussated \)y impressed lines, base smoother, shining; orange 

 brown, lighter around the umbilicus ; whorls 5, the last with a 

 compressed carina on the periphery, suture margined. 



Diam. 24, alt. 9-5 mill. 



Louisiade Is. 

 X. HAUGHTONI, Benson. PI. 17, fig. 51. 



Perforate, rather solid, irregularly obsoletely plicatulate above, 

 crossed by veiy fine spiral striae, smoother below ; olivaceous 

 brown, interior of aperture flesh brown; whorls 4^-5, suture 

 thread margined, shortly plicate, last whorl obtusely slightly 

 angled on the periphery, and again around the umbilicus ; colu- 

 mellar lip oblique, slightly callously dentate. 



Diam. 31, alt. 19 mill. 



Andaman Is. 

 N. Chambertinii, Tryon, is a synonym. 



N. NOV^E-HIBERNI^E, Quoy. PL 13, fig. 73. 



Narrowly perforate, thin, rugulosely obliquely striate above 

 and slightly malleated, smoother but microscopically malleated 

 and spirally lineated below; light brownish, with a narrow chest- 

 nut line, bordered below lay a yellowish line on the periphery, 

 base very light yellowish brown ; whorls 6, the last obtusely 

 angulated on the periphery. Diam. 19, alt. 10 mill. 



New Ireland. 



