NANINA. 39 



N. EXPLANATA, Quoy and Graimard, PL 13, fig. 69. 



Perforate, thin, closely obliquely striulate, mingled with wider 

 striae, 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 Muller 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 by Dr. 

 von Martens. 



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



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

 cussated by 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. HAUGHTONF, Benson. PL 17, fig. 51. 



Perforate, rather solid, irregularly obsoletely plicatulate above, 

 crossed lay very 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. Chamber -tinii, Try on, is a synonym. 



N. Nov-ffl-HiBERNi-ffl, 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 by a yellowish line on the periphery, 

 base very light }-ellowish brown ; whorls 6, the last obtusely 

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



New Ireland. 



