126 OCINEBRA. 



Carpenter describes a specimen from Mazatlan which he says 

 is intermediate between M. radicatus and M. lappa ; it is very 

 likely that they should be united, as he has done. 



M. FONTAINET, Tryon. PI. 35, figs. 384, 385. 



Eight varicose, the varices raised into five or six short lamel- 

 lar spines, crossed by revolving ridges ; body shouldered ; 

 aperture oval, closed ; outer lip bearing a tooth, and crenulate 

 within ; canal short, closed, direct. 



Length, 1'3 inches. 



Dredged near Payta, Peru, by M. Fontaine. 



This is the M. monoceros of d'Orbigny, a name preoccupied by 

 Sowerby for a Lower California species of the Cerostoma group. 



M. CRASSILABRUM, Gray. PI. 38, figs. 452, 453. 



Pure white. Length, 1-5 inches. 



Valparaiso, in crevices of rocks, at low water. Cuming. 



The generic position of this well-known shell has always been 

 doubtful ; its numerous laminated varices recall Trophon, from 

 which it is distinguished by its thickly variced and dentate lip ; 

 it has also been referred to Purpura. I have arranged it with, a 

 group of purpuroid Murices having some relationship with Cer- 

 ostoma, and inhabiting principally the same region, but differing 

 in possessing numerous varices. The typical species of this 

 group might possess sufficient distinction from Ocinebra to 

 deserve a peculiar name, but the limits of such a group could 

 only be arbitrarily defined. 

 M. JAPONICUS, Dunker. PL 31, figs. 445-448. 



Dark brown, with five to six lamellar Avarices, crossed by dis- 

 tant revolving ribs ; outer lip much thickened, dentate within ; 

 canal short ; sub-umbilicate. Length, 2 inches. 



Japan, Dr. Dunker and Dr. Lischke. North China, (M. 



Talienwhanensis, Crosse, figs. 445-447). 



The type specimen of this species, and the only one known to 

 Dr. Dunker, was much worn and did not present good characters; 

 Dr. Lischke, however, well describes it (p. 31, Jap. Meeres Conch. 

 Supp.) from numerous specimens. 



M. INORNATUS, Recluz. PI. 3T, fig. 444. 



Yellowish-brown, obscurely banded ; slightly roseate within 

 the aperture. Length, 1-25 inches. Hakodadi, Corea. 



