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N. Pfeift'eri, Phil. (PI. 1.1, fig. 144), has been referred to tin* 

 species as a variety by Marrat and others; I do not think, how- 

 ever, that it can be placed in the same group at all, as all its 

 affinities are with Zett.xix. 



X. TENUIS, E. A. Smith. PI. 7, figs. 4, 5. 



Yellowish white, mottled with yellowish brown, darker at the 



suture. Length, 20 mill. 



Japan ; China. 



This species was described by Lischke as N. Japonica, after- 

 wards changed to N. balteata, on account of the previous use of 

 the first name by Mr. A. Adams. N. balteata being preoccupied 

 by Pease, Mr. E. A. Smith has referred the species to his N. 

 tennis, which was originally described without reference to these 

 relationships. Mr. Smith also refers the N. Japonica, Adams, 

 here, doubtfully, the type having disappeared from the Cuming- 

 ian collection. I fear I must add to this confusion by doubting 

 the identity of Mr. Smith's species with balteata, Lischke, 

 although it appears to correspond well with Adams' description 

 of Japonica. 



N. sufflata, Gould (not figured), appears from the description 

 to be identical. 



The species is very closely allied to A r . mntabilix, L. 



N. L^VIGATA, Marrat. PL 7, fig. 6. 



Yellowish white, with darker strigations, which tend to mass 

 into revolving bands in some specimens. The suture is some- 

 times noduled. Length, *75 inch. 



China. 



The spire is more elevated, the shell more solid than the last 

 species; the coloration and polished surface allies it to the 

 mutabilis group. 



N. CORONATA, Brug. PI. 7, figs 7, 8. 



White, olive or chestnut; with usually a white median zone 

 on the dark varieties or a darker zone on the light colored 

 specimens. Length, 1-1-2 inches. 



Madagascar, Java, Philippines, etc. 



N. firotini, Phil. (fig. 8), is not distinct. 



