74 NERITINA. 



Von Martens separates N. vespertma on account of a slight differ- 

 ence in convexity of whorls, and habitat, but in the large series 

 before me frojn both Taheiti, and Sandwich Is., the supposed local 

 peculiarities disappear. 



N. Christovalensis, Keeve. PI. 21, figs. 68, 69. 



Convex, striulate, yellowish, with spiral bands of reddish chestnut 

 markings ; aperture yellowish, columellar area slightly arcuate and 

 minutely dentate in the middle. Diam. 19 mill. 



San Christoval, Solomon^s Is. 



K. BicANALicuLATA, Recluz. PI. 21, fig. 70. 



Rather depressed and somewhat widely winged ; olive brown, 

 rather closely reticulated and sometimes banded with reddish chest- 

 nut ; aperture bluish white clouded or changing to greyish yellow, 

 columellar margin without teeth, area minutely punctate. 



Diam. 15-20 mill. 



Philippines, Viti Is. 



The ears are usually broader than in the specimen figured, but 



the depressed form and markings are pretty constant in the series 



before me. It is X. biauriculata, Reel. 



N. Lecontei, Recluz. PI. 22, figs. 74, 75, 76. 



Very convex, with numerous elevated close spiral lines, olivaceous 

 brown, spirally more or less liueated with black ; aperture lead color 

 or yellowish grey ; columellar margin incised, minutely and reg- 

 ularly dentate in the middle, area rugose and minutely granular. 



Diam. 1 in. 



New Caledonia. 



N. Novce- Caledonica, Reeve, (fig. 76) is a synonym. 



N. ACicuLATA, Morch. PI. 22, figs. 77, 78. 



With small, distinct, obliquely lateral spire, closely radiately 

 striated, dark olivaceous, unicolored ; columellar margin arcuate 

 and dentate in the middle. Diam. 17 mill. 



Nicohar Is.; Sumatra f 



It is N. navicularis, Morch (undescribed). 



N. MARMORATA, Brazier. Unfigured. New Guinea. 



