TR1TIA. 55 



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

 raia, Marrat (fig. 309), and N. retecosa, A. Ad., not J. Sowb. = 

 N. Adamsiana, Marrat (fig. 310). 



N. CUMINGII, A. Ad. PI. IT, fig- 311. 



Ovate, rather ventricose, solid, suture flatly 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. PI. IT, figs. 312-315. 



Yellowish white, stained and spotted with chestnut ; suture 



flatly channeled. Length, 1 inch. 



Philippines, Sts. of Sunda. 



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

 Desh. (fig. 315), nnrl N. variegata, A. Ad. (fig. 314), are syn- 

 onv*ms. 



,-ubgenus Tritia, Risso. 



Distinguished from Niotha by its narrow callus, yet some of 

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

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

 into Triliti, as a synonym. Schiztipygfy Conrad, founded on a 

 miocene species (H. Californica. PI. 3, fig. 32), probably equiva- 

 lent to N, ]K',r/>in(/uiK, Hinds, is also a synonym. 



( .'<></ *t of America. 

 X. FOSSATA, Gould. PL IT, 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. 31 T), 

 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 b}^ J. Sowerby for a fossil 

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

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

 N. Morleti, Crosse (fig. 318). 



