NERITINA. 61 



N. Afra, Sowb. PI. 20, figs. 42-44. 



Very slightly stviulate, spire somewhat prominent, partially en- 

 veloped by the last whorl, yellowish olive to brown or nearly black, 

 reticulated with black, often forming obscure spiral l)ands; aperture 

 bluish white, columellar area yellowish brown, flattened, the margin 

 finely toothed. Diam. 15-20 mill. 



West Coast of Africa. 



As in most sinnlarly marked species, the interspaces of the reticu- 

 lations sometimes have the appearance of nebulous spots on a dark 

 surface. The synonyms are N. cequinoxialis, Morelet, N. Listen, 

 Reeve (figured), JSf. Africcuia, Recluz, iV. r(f6r/c(fto, Morelet (figs. 43, 

 44), and N. Calabarica, Mousson. 



N. Fraseri, Reeve. PI. 20, fig. 45. 



Olive black, longitudinally ridged-striate, spire but little exserted; 

 aperture bluish white, columellar margin sinuous and minutely 

 dentate in the middle, area flattened, yellowish. Diam. 14 mill. 



West Afriea. 



This species is unknown to me. 



N. Sandalina, Recluz. PI. 20, figs. 46-48. 



Growth strise crossed by very faint impressed lines, last whorl 

 obtusely shouldered, slightly concave above the shoulder, more or 

 less enveloping the rather high spire, brown to black, sometimes 

 obscurely reticulated ; aperture and columellar area bluish white or 

 yellowish, columellar margin sinuous and dentate in the middle. 



Diam. 16-22 mill. 



Sandalwood Bay, Malaysian Archipelago, Viti Is. etc. 



N. cholerica, Gould (fig. 47), JSf. Vanicorensis, Honibr. (fig. 48), 

 and N. Caffra, of Garrett are synonyms. There is but little differ- 

 ence between this species and JV. propinqua, Mousson in the appear- 

 ance of the shell: the latter has not columellar teeth. 



N. ADUMBRATA, Reeve. PI. 20, fig. 49. 



Last whorl a little depressed around, but not enveloping the spire, 

 smooth, shining, yellowish olivaceous to brown, closely or coarsely 

 reticulated with black, or appearing nebulous on a darker ground; 

 aperture bluish w'hite, columellar area flattened, posteriorly orange 

 brown, edge slightly sinuous and minutely dentate in the middle. 



Diam. 18-30 mill. 



Solomon^s Is. 



