NERITIXA. 69 



N. RARISPINA, Mousson. PL 25, figs. 65, 66. 



Striate, dark greenish, minutely punctulate with black, last whorl 

 obtusely angulated, and obsoletely or shortly spinose; aperture 

 bluish, columellar area rather narrow, plane, margin with a dentate 

 median sinus. Diam. 6-9 mill. 



Java. 



According as the shell is with or without spines, Mousson has 

 made varieties spinosa and destituta, which, of course, have no 

 varietal value. The species itself has not been identified. 



N. TRITONENSIS, Guillou. PI. 25, fig. 61. 



Greenish, with arcuate longitudinal yellowish lines, spire entirely 

 eroded, flat; aperture oblique, with a rather narrow, flat area, its 

 margin subarcuate, uriidentate, lip rounded, depressed above. 



Triton Bay, New Guinea. 



The above is a copy of the original description which was not 

 illustrated. The figure is from Reeve, and I cannot believe that it 

 pertains to the same species ; it looks more like N. chlorostoma, Brod. 



N. BICOLOR, Reel. PI. 25, figs. 68, 67, 69; PI. 26, fig. 75. 



Shell plicate-striate, the body whorl enveloping the spire, some- 

 what shining, closely finely strigate with alternate yellowish and 

 olivaceous green, sometimes minutely punctate with the lighter color 

 upon the darker, as though serrating the margins of the strigations; 

 aperture bluish white, columellar area flattened, subrugose, margin 

 slightly incurved and faintly dentate in the middle, the curve boun- 

 ded by a stronger tooth above. Diam. 15-27 mill. 



East Indies to Philippines. 



It is N. celata, Recluz, (fig. 69), N. subpunctata, Recluz, (fig. 67), 

 X. rugata, Souleyet, N. rugosa, Bush, N. punctifera, Mousson, and 

 varieties glandiformis, Molluccensis and tricolor of Martens the 

 latter with reddish brown rugse and a basal zone of the same, with 

 elongate triangular diaphanous yellowish maculations. I have not 

 seen this variety, nor has it been figured except a section showing 

 coloring, but I can scarcely believe it to belong here the pattern 

 is more like N. avellana. Finally in N. Wallisii, Mousson (fig. 75) 

 =N. rugata, Gallies, we have a sparsely spinose form which appears 

 to connect very closely with the spinose form of the next species. 



X. OLIVACEA, Recluz. PI. 26, figs. 71, 72 : PI. 25, fig. 70. 



Smooth, slightly striate, dark olivaceous varying to brownish with 

 obscure black undulating lines, often obsolete, occasionally with one 



