76 NERITINA. 



out with zigzag black reticulations ; aperture bluish white or yellow- 

 ish grey, columellar margin slightly arcuate and dentate in the 

 middle. Diam. 16 mill. 



Taheiti, in streams. 

 iV. navicellina, Guillou, N. florida, Recluz are synonyms. Von 

 Martens refers here jS\ Owenii, Wood's Index Test. Suppl. t. 8, f. 

 16, but it appears to me to belong to the next species. 



N. LATissiMA, Brod. PI. 22, fig. 87-89. 



Finely striulate, Avith produced but broadly rounded ears, oliva- 

 ceous or brownish black, reticulated A\'ith black or triangularly 

 marked with numerous light, black margined spots ; aperture bluish 

 or yellowish grey, columellar margin a little concave, scarcely in- 

 curved but minutely dentate in the middle. Diam. 20-37 mill. 



West coast of Central America. 



The synonvms are X. glohosa, Brod., 3". intermedia, Sowb. (fig. 89). 



Var. PiLSBRYi, Tryon. PI. 22; fig. 91. 



A color variety characterized by a purplish or pink very fine re- 

 ticulation upon a white ground, upon which are numerous subtri- 

 angular white s])ots with dark margins. 



Var. FoNTAiNEANA, d'Orb. PI. 23, figs. 92,' 93. 



Smoothish, olivaceous, reticulated with black, with one or two 

 greenish or blackish zones. Less winged than the type. 



Gtuiyaquil, Eqaador. 



It is N. Guaquilensis, Sowb. (fig. 94.) 



N. OwENiAXA, Gray. PI. 22, fig. 90. 



Slightly, closely striulate, yellowish or brownish olivaceous, with 

 a small or large reticulating pattern of black lines, often forming 

 triangular light spots, last wdiorl usually enveloping the spire ; 

 aperture bluish white to greyish yellow, showing the external pat- 

 tern, columellar margin nearly straight, edentulous, or obscurely, 

 minutely dentate in the middle. Diam. 18-25 mill. 



West coast of Africa; Ins. Fernando Po, Cape Pahnas. 



N. CRIST ATA, Moi-elet. Unfigured. Gabon, W. Africa. 



N. ALATA, Brod. and Sowb. Taheiti. 



