NERITA. oS 



N. Georgina, Recluz. PI. 7, fig. 31. 



With acute, subdistant ridges, frequently in pairs, yellowish grey 

 articulated with black ; aperture yellowish, with black spots on the 

 margin, columellar area smooth, the margin obscurely dentate, den- 

 ticles of interior of outer lip obsolete. Diani.18 mill. 



King George s Island. 



N. MORio, Sowb. PI. 9, fig. 75; PI. 8, figs. 41, 46. 



Black, usually polished, with slightly impressed spiral lines; 

 aperture yellowish, the outer lip callously thickened Avithin, but not 

 toothed, columellar lip minutely or obsoletely toothed in the middle, 

 area somewhat concave, polished, smooth. Diam. 18-22 mill. 



Atistralia, New Zealand, Polynesia. 



Confounded with ^V. atrata, Linn. N. nigerrima, Chemn. N. Sene- 

 galensis, Gmel. etc. but differs by the smooth interior of the outer 

 lip, as well as by its oblique last whorl. It was described as a 

 Neritina, and afterwards by Reeve as ^Y. Neritinoides (fig. 46); 

 another synonym is N. carbonaria, Philippi (fig. 41). 



"N". EssiNGTONi, Recluz. PL 8, fig. 45. 



Shell with somewhat high sjjire, black, conspicuously spirally 

 sulcate; outer lip smooth within, columellar lip slightly dentate on 

 the middle margin, the area smooth. Diam. 18 mill. 



Australia. 



Has much the appearance of ^Y. nigerrima externally, but diflfers 

 in its columellar area ; also resembles N. atramentosa, except in the 

 absence of the teeth within the outer lip. Very probably they will 

 all prove to belong to one and the same species. 



N. picEA, Recluz. PI. 8, fig. 47; PI. 9, figs. 52, 70, 74; PI. 4, fig. 60. 



Shell smooth, polished, with close or distant slight engraved lines, 

 black, often showing faint minute greyish flecks, but frequently so 

 obscure as to be scarcely visible; aperture white, outer liji without 

 teeth, columellar margin minutely or obsoletely dentate in the 

 middle, area flat, smooth, polished. Diam. 12-18 mill. 



Japan, Polynesia to Sandivich Is^ 



I have been on the point of merging this in the preceding species 

 as a synonym. In its unspotted state it is only distinguished by 

 smaller size. iV. obseura, Hombr. and Jacq. (fig. 52), N. insculpta,. 

 Reeve (fig. 74), and N. bullula, Reeve (fig. 70), are synonyms,, 

 The shell which Philippi has figured for N. picea (fig. 60), if that 

 species, is a somewhat abnormal specimen. 

 3 



