PHTLLONOTUS. 103 



figured a specimen of M. sobrinus, A. Ad., in error, for this 

 species. 



. * 



M. HUMILIS, Brod. PI. 26, figs. 234, 235. 



Pyriform, the whorls depressed on the shoulder, spire rather 

 short and canal longer ; eight frondose varices, crossed by 

 distant revolving cosfae. Light brown, pink-tinged. 



Length, T5 inches. 



St. Elena, W. C. Gen. America. 



M. octogonus, Sowb. (fig. 235), said to come from New Cale- 

 donia, and described from a specimen in the Cumingian collec- 

 tion, appears to me to be a depauperated specimen of the same 

 species. The specific distinction pointed out by Sowerby does 

 not hold good against the more perfect specimen of M. humilis 

 figured by Reeve. 



M. MULTICRISPATUS, Dunker. PL 26, fig. 231. 



Pyriform, with ten frondose varices, the spines of which form 

 a coronal on the body ; transversely ribbed, ribs alternately 

 larger. Light brown, the larger ribs chocolate colored as well 

 as the fronds. Length, 2 inches. 



Pacasmayo, Peru ; found on a reef, at a 



depth of 25 fathoms, 12 miles from shore. 



This shell was originally described by Broderip as M. crispus; 

 which name was pre-occupied by Lamarck for a fossil species. 



M. MELANOMATHOS, Gmel. PI. 26, fig. 230. 



Globosely pyriform, with eight spinous varices, crossed by 

 revolving ribs ; some of the spines erect, long, especially those 

 on the lip-varix. Whitish or yellowish, spines frequently black. 



Length, 2'25 inches. 



Real Llejos, W. C. Gen. America. 



This, and the two preceding species, may hereafter prove to be 

 identical. 



M. FIMBRIATUS, A. Adams. PI. 26, fig. 240. 



Shell pyriform, fulvous ; shoulder excavated and crossed by 

 wing-like continuations of the seven digitated varices. Aperture 

 ovate, external margin crenate, canal attenuated. 



Length, 1'45 inches. Gulf of California. 



