NERITINA. 41 



N. Sayana and N. phasiana, Recluz. Unfigured. Philippines. 



N. piCTA, Sowb. PI. 18. figs. 52-55. 



Smooth, polished, yellowish or grey or broadly alternately banded 

 with both, with flexuous oblique, bluish white strigations; aperture 

 bluish, columellar area flattened, chestnut color, margin rather 

 strongly denticulate. Diam. ll-13'5 mill. 



Gulf of California to Panama. 



Various color variations have been narmed vars. nigrofasciata, 

 Inteofasciata, guttata and albescens, Miller. 



N. Ualanensis, Lesson. PI. 13, figs. 56-68. 



Smooth, shining, many colored, usually yellow, olivaceous or pink, 

 with subundulating to reticulating close longitudinal purple-black 

 or reddish lines, continuous over the whole surfiice, or interrupted 

 to form spiral bands, often with subtriangular light colored spots 

 with darker margins in spiral series ; aperture usually yellowish, 

 sometimes bluish white, columellar area narrow, a little convex, 

 yellowish, faintly coriaceous-rugulose and foveolate, the margin 

 with a central sinus which has four or five minute teeth, and a 

 larger one above them. Diam. 7-12 mill. 



Indian Ocean to Polynesia. 



A widely distributed species, which closely mimics the West 

 Indian N. virginea. Like that species, it inhabits both brackish 

 water and the ocean, and it is equally variable in its markings. It 

 is perhaps less conical, as a rule, smaller, its columellar area is more 

 yellowish and flatter. The operculum differs somewhat from that 

 of N. virginea, the rib and apophyses are well-developed, nearly 

 equally large, with a connecting band almost equally elevated. 



The synonymy includes N. Oualaniensis, Lesson, N. nuhila, 

 Busch, iV. MertonianM, Recluz, N. nehulata, and N. Ceylonensis, 

 Recluz, N. Garretti, Mousson, N. indchella, Morch, N. cincta and 

 N. columbaria, Recluz, N. Gaimardi, Souleyet, N. ornatella, N. 

 delicatula, N. guttulata, and N. multipicta, Mouss. Mss. and the 

 following color-varieties, named by von Martens : conferta (fig. 56), 

 polydelta (figs. 57, 58), diremta (figs, 59, 60),frondicincta (figs. 61- 

 64), nigrobifasciata (figs. 65, Q6), j^arcepicta (figs. 67, 68). 



N. NouLETiANA, Gassics. PL 13, figs. 69, 70. 



Solid, shining, blackish violaceous, with superimjjosed tent-shaped 

 whitish or yellowish maculations, apex violaceous ; columellar area 



