104 PHYLLONOTUS. 



I place this species here with considerable doubt, as it has 

 other relationships which are quite as close, judging from 

 Sowerby's figure of the back of the shell. It is allied to M. 

 gemma, for instance, which I have considered a variety of M. in- 

 cisus ; it has also the appearance of a Vitularia. 



M. Stainforthii. Reeve. PL 26, fig. 23'7. 



Ovate, with seven to eight frondose varices, fronds alternately 

 larger, short, close-set, sharp ; with revolving, alternately larger 

 ribs. White, fronds dark brown or black. Length, 2'25 inches. 



N. Austr. 

 M. ANGULARis, Lam. PI. 26, figs. 241, 239. 



Ovate, spire elevated, body-whorl more or less shouldered, 



varices five to eight, frondose, the fronds on fresh specimens 



raised into short, sharp spines ; with alternately larger, revolving 



lines of darker color, on a light brown surface ; spinous fronds 



blackish. Length, 1-5 inches. 



Senegal. 



Spire more elevated, spines longer, not so close-set, less fron- 

 dose than preceding species. Frequently the varices are de- 

 nuded of fronds altogether, and are simply nodulous, and in this 

 state the resemblance to M.fasciatus, Sowb., is rather suggestive 

 of their identity. I think that M. tenuis, Sowb. (fig. 239), may 

 = angularis, jny. 



M. PASCiATUS, Sowb. PL 20, fig. 191 ; pi. 26, figs. 232, 236, 238. 

 Shell thick, varices seven or eight, sometimes onl}' ribs, so that 

 in occasional specimens the number of true varices is reduced to 

 three (fig. 191) ; surface covered with revolving, rib-like striae. 

 Light brown, the varices darker ; frequently the entire surface is 

 variegated with rufous bands on the revolving striae. Outer lips 

 thickened, dentate-lirate within ; aperture white. Length, 1"25- 

 1'5 inches. 



W. C. of Ajrica. 



M. angularin, Lam., when denuded of spines, much resembles 

 this species, but is thinner. It is singular in forming indifferently 

 ribs or varices, varying in number. I figure a specimen from 

 Cape Yerde Isles sent to me by Mr. Sowerby as M. lyratus, A. 

 Ad. (fig. 236) ; it appears to me = this species ; as does also the 

 figure of lyratus in Thes. Conch, (fig. 288). 



