common. It has man}' synonyms: N. filutui, GrMy (fig. 134), 

 N. graphiterdi Beck (fig. 135), N. Reeveana, Dunker (fig. 13rt), 

 .V. dispar,.A. Ad. (fig. 137s & lurida, Gould (fig. 138V X. 

 musiva, Gould (fig. 139), as well as probably the the following 

 unfigured species, N. Kienvri, Anton, N: obliquata, A. Ad., X. 

 plicatula, Dunker. 



The three following species appear to me to be mere varieties 

 of N. picta, perhaps connecting it with N. gaudiosa: 

 Yar. MARMOREA, A. Ad. Fig. 140. 



Whitish, marbled with yellowish brown, the maculations some- 

 times disposed in two or three bands. Length, 1 inch. 



Philippines, sandy mud, at 25 fathoms. Cumiiig. 

 Var. ALGIDA, Reeve. Fig. 141. 



Livid olive, blotched with white, and painted longitudinally 



with waved brown streaks. Length, 1 inch. 



Moreton Bay, Australia. 

 Var. BICALLOSA, E. A. Smith. Fig. 1 42. 



Whitish, livid at the sutures. Length, 1 inch. 



West Australia, Swan River, Cape Natal. 



The double tubercular callus at the base of the columella is 

 not unfrequently developed in very hc*ivy specimens of other 

 species, and is an individual rather than specific character. 

 N. CONSPERSA, Phil. PI. 11, figs. 143, 144. 



Shell very small, smooth, thick ; yellowish or white, maculate 

 with chocqlate, forming on the body whorl two irregular bands. 



Length, -4--5 inch. 



Canary Islands. 



Does not differ essentially from N. picta, except by its much 

 smaller size and heavier structure : it may well be a dwarf form 

 of that species. N. Pfeifferi, Phil. (fig. 144), is synonymous. 

 Several authors have recognized this shell as N. glaberrima, 

 Gmel., but the description is indefinite, and the figures referred 

 to are unrecognizable. 

 N. HALDEMANI, Dunker. PI. 11, figs. 145, 146. 



Whitish, marbled with yellowish brown or chestnut zebra-like 

 markings, smooth and polished, initial whorls longitudinally 

 plicate, base of body whorl with revolving impressed lines. 



Length, -5 inch. 



East Indies. 



