OCINEnRA. 131 



M. CONTRACTUS, Reevc. ['1. 88, fi«is. 471-474. 



Light l)rown, the rcvolvinii- ribs sometimes darkor in the in- 

 terstices ol" liic loiiojtudiiial jilicse ; .apei'ture white witliin. 

 C)]-)erenluni |)iir|)uroi(l. Ijengtli, 1-4 inches. 



New Galedoniii ; PliillfpineK. ; Vltl Idea. 



Very closely allied to M. Poiilsoni hut diffevs in the revolving 

 lines of color being replaced l)y close sculpture; sometimes 

 these revolving riblets become alternately larger. Reeve's Biicc. 

 fumculofHin (fig. 474), is certainly tlie same species, and I 

 scarcely doubt the identity of his B.concenlriciim, (fig. 472), and 

 B. ligneiim, (fig. 473), tlie latter being a young sliell with longer 

 s])ire tlian usual. 



M. LURiDis, Midd. PI. 38, figs. 481, 485. 



Fusiform, spire elevated, canal short, o])eu ; whorls closely 

 asperately lirate, the lime crossing a few rounded ribs ; aperture 

 dentate within. Reddish or chocolate. 



Length, -85 to 1 inch. 



Sit/,'a to California. 



The var. a.s/>fir«, Baird, appears to me to l)e simply the fresh 

 state of this species, specimens of whicli are generally water- 

 worn. Li the latter condition, when starved into a narrow, small 

 form, Carpenter has distinguished them as var. niiouJa. 



M. TNTERFOssus, Car[)euter. PI. :]fl, fig. 484. 



Shell narrower and more shouldered than the last species, the 

 lattice of revolving lir<Te and longitudinal ribs coarser and more 

 elevated ; canal short, closed. Lengtii, -4 to -75 inch. 



Sitl-a to California. 

 M. GRACILLIMUS, Steams. PL 39, fig. 480. 



Light brown, the revolving costiie sometimes wliite, spotted 

 with red. Length, -5 incli. 



San Diego, Cal., to L. Cal.; Santa Gatalina Is., common from 



low water to :50 fathoms. 



M. CTRCUMTEXTUS, Steams. PI. 39. fig. 478, 494. 



Whitish with brown blotches ; yellowish to purplisli within. 

 Length, -75 inch. 



Calif or 71 ia. 



I give in addition to the original figure, that of a larger 



