126 OCINEBRA. 



Carpenter describes a, specimen from Mazatlan which he says 

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

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



M. PONTAINET, Try on. 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 Gerostoma 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 3T, figs. 445-448. 



Dark brown, with five to six lamellar varices, 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 t} r pe 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. PL 37, fig. 444. 



Yellowish-brown, obscurely banded ; slightly roseate within 

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



