44 NERITINA. 



N", iNCERTA, Gassies. PI. 14, fig. 89. 



Solid, striate, with spiral engraved lines, whitish under a black 

 and rosy epidermis, with black lines or flames forming three bands ; 

 peristome whitish, interior white, yellowish or rosy. Alt. 13 mill. 



JV. Caledonia. 



Only known to me by the figure and description. 



N. ELLIPTICA, Guillou. Unfigurcd. Marquisas Is. 



Section Neritodryas, Martens. 1869. 



N. DUBiA, Chemn. PL 14, figs. 90-95. 



Finely, faintly striulate, without sj)iral sculpture, olivaceous or 

 orange-brown, with a fine or coarse pattern of zigzag black lines, 

 often interrupted to form bands, sometimes only appearing here and 

 there, or entirely absent, seldom confluent, making the entire sur- 

 fiice thick ; aperture bluish white, often with an orange tint near 

 the margin, columellar area usually tinted with yellow, varying to 

 orange brown, the margin edentulous. Diam. 20-27 mill. 



East Indies, Philippines, New Caledonia, etc. 



The synonyms are N. fasciata, Lam., N. lugubris, Lesson, N. reti- 

 culata, Quoy and Gaim., N. zebroides, Lesson, N. Philippinarum, 

 Sowb.,? N. vestita, Souleyet, JV". bella, Busch, N. Adamsi, Issel, JSf. 

 atra. Lesson. 



Var. APIATA, Recluz. Fig. 95. 



Yellowish olivaceous, transversely flecked with yellowish white. 



Diam 16 mill. 



As this has heretofore been treated as a distinct species, I retain 

 it as a variety, but its characteristic markings shade ott' into those 

 of JV. dubia, of which it is a juvenile state of growth. 



N. CORNEA, Linn. Pi: 14, figs. 96-100, 1. 



With low, flatly rounded riblets separated by incised spiral lines, 

 the sculpture usually faint, sometimes obsolete, yellowish brown or 

 olivaceous, generally more or less interruptedly banded and sub- 

 tessellated with black, occasionally all black ; aperture whitish, 

 columellar area white, or more or less tinged with yellowish to 

 orange-brown, when ^vhite often Avith black blotches behind, margin 

 edentulate, varying to obsoletely minutely toothed. 



Diam. 25-42 mill. 



East Indies, Philippines, New Caledonia, Viti Is., etc. 



