PHYLLONOTUS. 105 



M. FIMBRIATULUS, A. Ad. Suppl. pi., fig. 531. 



Ovate-fusiform ; light fuscous ; spire produced ; whorls six, 

 convex, longitudinally nodosely subplicate, transversely lirate, 

 lines squamulose, equal, crowded ; aperture ovate, entire ; outer 

 lip elegantly fimbriated, fimbrise wide, laciniated on the margin ; 

 canal straight, produced, closed. There are no varices on the 

 whorls, except the broad, fimbriate one which margins the outer 

 lip A It is an elegantly formed species with squamulose liraa 

 crossing the very convex whorls. Fawn or light-reddish, with a 

 narrow, interrupted darker median band ; pale pink or flesh color 



within. Length, 19 mill. 



Japan. 



Described as a Trophon which it certainly is not. Mr. E. A. 

 Smith has recently published a figure of the species, which we 

 copy. 



M. NITIDUS, Brod. PI. 26, fig. 233 ; pi. 27, figs. 242, 243. 



Ovately pyriform, ventricose, spire short, body-whorl shoul- 

 dered ; with flat, broad revolving ribs, which, as well as the 

 interstices, are covered with close fine striae ; varices eight to 

 thirteen in number, frondose, the alternate fronds much largest, 

 long, spinous. Whitish, ridges and fronds black. Length, 4-7 



inches. 



Mazatlan. 



I give to this species its oldest name, which was, however, 

 applied to a young specimen. The adult has been described as 

 M. nigritus, Phil. (fig. 243), under which name it is more gene- 

 rally known. M. ambiguus, Reeve (fig. 242), is not entitled to 

 distinction even as a variety. 



M. RADIX, Gmel. PI. 27, figs. 244, 247, 248. 



Shell globose, very solid and thick, spire and canal very short; 

 spirally ribbed ; varices ten to fifteen, very close set, prickly with 

 stout, short, sharp spines. Color whitish, ribs and spines black ; 

 but the latter are so close as to give the shell a black appearance. 



Length, 3 to 5 inches. 



Panama. 



Although belonging to a different zoological province, I think 

 that the differences between this and the preceding species are 

 due to a more stunted and slower growth in M. radix, and that 

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