66 NERITIXA. 



N. RHYTIDOPHORA, Tapparone-Caiiefri. PL 24, figs. 29, 30. 



With elevated, obliquely longitudinal rugae, olivaceous green, or 

 light greenish pink, with undulating brown or black lines, sometimes 

 evanescent, and sometimes with a submedian black spiral band; 

 aperture light yellowish or brownish grey, columellar area brownish, 

 shining, very minutely rugulose, margin centrally incurved and 

 finely toothed. Diam. 15 mill. 



Ins. Sorong, JV. Guinea. 



N. THERMOPHILA, Martens. PL 24, figs. 35, 36. 



Plicately striate, olivaceous brown, with occasional yellowish 

 maculations, sometimes black-margined, occasionally triseriate, 

 slightly shining, peristo me yellowish within, sub-thickened, columellar 

 margin obtusely dentate in the middle, upper tooth much larger, 

 area slightly rugose, orange-yellow. Diam. 6'5 mill. 



Isl. New Britain. 



Only known to me by the description and figure, but appears not 

 unlike a spineless JV. brevispina. 



N. H.EMASTOMA, Martens. PL 24, fig. 37. 



Striulate, olivaceous brown, with small yellowish, black-margined 

 spots; aperture bluish white, columellar margin slightly incurved in 

 the middle, with a few indistinct teeth on the upper part of the 

 sinus, area plane, scarlet. Diam. 2(ro mill. 



Philippines. 



Described from a single specimen. 



N. CHLOROSTOMA, Brod. PL 24, figs. 38, 39; PL 25, fig 62; PL 26, 



figs. 83-85. 



Smooth, somewhat shining, greyish, varying to violaceous, light 

 brown or black, with numerous, usually minute white dots and 

 spots which, when the ground color is light, are black-margined, 

 sometimes indistinctly darker banded; aperture whitish, yellow, 

 olivaceous etc, columellar margin scarcely sinuous in the middle, 

 edentulous, or obscurely dentate, area plane, smooth, often tinged 

 with yellow posteriorly. Diam. 7-12 mill. 



Marquesas, Harvey, Cook's, Samoan and Viti Is. etc. 



The synonymy includes X. pisiformis, Recluz, J\ T . siderea, Gould, 

 (fig. 83), N.parvnla, Guillou, .V. tristis, Reeve, (fig. 85), X. lentuji- 

 nosa, Reeve, (rig. 62), JV. (U*par, Pease, (fig. 84), N. Harveyensis, 

 Mousson, N. paludosa, Garrett, Ms. 



