128 



OCTNEBRA. 



specimen. The latter is thus described: Ovate-fusiform, five 

 varicose, solid, whitish ; whorls five, angulated in the middle, 

 flattened above, transversely lirate ; varices lamellate, crispate, 

 terminating in strong triangular spines on the shoulder ; aperture 

 oblong, purplish within, narrowed in front, the lip thick, fim- 

 briated, denticulate within ; canal closed, reflected. Operculum 

 purpuroid. Length, 1-75 inches. 



Hakodadi, 5 fathoms ; Tsusaki, (Jap.}, 37 fathoms. 



M. ENDERMONIS, Edg. Smith. PI. 38, fig. 454. 



Ovate, spire turrited ; whorls six, with sloping shoulder above, 

 and angulated periphery ; varices seven, laciniate, uncinate above ; 

 crossed by unequal, scabrous lirations. Aperture ovate, purplish ; 

 lip thickened, fimbriate, denticulate within, with a prominent 

 basal tooth ; columella bluish-white, maculated with brown-purple 

 in the middle ; canal closed, short, slightly recurved. 



Length, 1'35 inches. 



Endermo Harbor, Yesso, Jap., 4 to 7 fathoms, sandy mud. 



Some of the spiral lirations, that at the angle of the whorls 

 and three or four others in the last whorl, are much larger than 

 the rest, and with the varices produce a coarsely cancellated 

 aspect. M. Talienwhanensis, Crosse, and M. inornatus, Kecluz, 

 are both allies of this species, but lack the labral tooth. 



I have not seen a specimen. 



*** Group of M. alveatus, Eiener. 

 M. ALVEATUS, Kieiier. PL 38, figs. 469, 467, 464. 



Shell long and narrow ; spire much elevated, of seven or eight 

 convex whorls separated by deep sutures ; varices three to eight, 

 thick, fimbriated, crossing the sutures ; six or eight revolving, 

 narrow, seal} 7 ribs, with intervening deep sulci ; mouth small, 

 oval ; canal short. Whitish or yellowish. Length -75 to 1'25 



inches. 



West Indies, 1 to 2 feet water, among madrepores. 



The history of this species is somewhat involved : Kiener gave 

 no habitat, but Panama has been assigned to it by most subse- 

 quent conchologists. I think that the species has been con- 

 founded with M. erosus, Brod.,a Panama shell, which is certainly 

 so close to this as to lead to grave doubts of its distinctness. A 



