TRITIA. 5f) 



With this I unite N. cremala, Reeve, not Hinds = N. quad- 

 rata, Marrat (tig. 309), and N. re.tecom, A. Ad., not J. Sowb. = 

 N. Adamsiana, Marrat (fig. 310). 



N. CuMiNGii, A. Ad. PI. 17, lig. 311. 



Ovate, ratlier ventricose, solid, suture flatl}' channeled. 



White, stained with faint chestnut-color. Length, 1 inch. 



China. 

 Distinguished by the swollen character of the whorls — yet 

 probably only an intermediate form between the last and next 

 species. 



N. GEMMULATA, Lam. n. n, figs. 31^-31.5. 



Yellowish white, stained and spotted with chestnut ; suture 



flatly channeled. Length, 1 inch. 



Philippines, Sts. of Sunda. 

 N. rJafhfota, Lam., Encyc. Meth. (fig. 313), N. conoidalis, 

 Desh. (fig. 315), and N. variegata, A. Ad. (fig. 314), ai"e syn- 

 onyms. 



Mibgenus Tritia, Risso. 



Distinguished from Niotha by its narrow callus, yet some of 

 the last species in that group form a passage into this. Gaesia, 

 11. and A. Adams, has no distinctive character, and must merge 

 into Tritia as a synonym. SrJrizopi/ga, Conrad, founded on a 

 miocene species (S. Coliforniea. PI. 3, fig. 32), proba])ly equiva- 

 lent to N. perpinguis. Hinds, is also a synonym. 



/j, * West Coast of America. 



J X. FOSSATA, Gould. PI. n, figs. 316-318. 



Light yellowish brown, interior of aperture and columella 

 deep orange, the sharp, raised, revolving ribs of the interior 

 white. Length, 1-2 inches. 



Coast of California, 

 A magnificent and peculiar species, not to be mistaken for any 

 other, and the largest in the genus. N. elegans^ Reeve (fig. 317), 

 very fairly represents it, the figure and description of Gould 

 (fig. 316) being from a form more ventricose than usual, and not 

 adult, N. elegans being preoccupied by J. Sowerby for a fossil 

 species, Adams changed the name to N. Reevei — which falls 

 before Gould's prior name. To this svnonymy is to be added 

 N. MorJeti, Crosse (fig. 318). 



