90 



CHICOREUS. 



varices, or :it most with au occasional second, much smaller rib. 

 Usually dark colored, but sometimes as light as M. 2Johna-ros8P 



and like it pink-tinged. Length, 4 inches. 



Vhina. 

 The typical forre factum may be regarded as a rather slim, 

 elongated form of the species, the iisual state of which is l)etter 

 represented by M. Steerise (fig. 151), one of its synonyms. 



M. ADUSTUS, Lam. PI. 15, figs. 148, 149; pi. 24, figs. -210-212 ; 

 pi. 25, fig. 217. 

 Its jet black color, remarkably frondose spines, crowded even 

 on the canal, and pink (sometimes yellow) lipped aperture, 

 separates this species from M. tor^-ef actus ; which it resembles in 

 having a single large rib between the varices. 

 Length, 3'5 inches. 



Ind. 0., Philippines, Japan. 



Mr. E. A. Smith* has compared the type of M. dei<pecf u >> A. Ad. 

 (fig. 211), with specimens of adust us and finds it to agree 

 perfectly. The locality of despectus "West Indies " is certainly 

 an error, as uo species of this group is found there. The fignre 

 of despectus published by Sowerby leaves no room to doubt its 

 identity with advstus. 



M. rufus, Lam., (fig. 148), is the young of this species. M, 

 fuscus, Dunker, and M. trivialia A. Ad., (fig. 212), are also founded 

 on a 3'oung state. M. Australiensis, Angas, (fig. 210), and M. Hut- 

 tonide, Wright, (fig. 217), may be classed as mere color variations 

 of M. adust us. 



M. PALMiFERUS, Sowb, PI. 14, figs. 146, 147; pi. 24, fig. 215; 

 pi. 25, fig. 218. 

 This is a small species, I'anging from 1'5 to 2 inches in length, 

 iisually whitish with the long spire tipped with pink ; the 

 peculiarl}^ scabrous surface is raised into two ribs between the 

 A' arices. The fronds are short and so close as sometimes to form 

 a continuous frill. 



Red Sea, Ind. 0., N. Austr. 



M. corru(/afus, Sowb., (fig. 147), does not differ and M. dilec- 

 tus, A. Ad., (fig. 218), as well as 31. muJtifrondosus, Sowb., (fig. 

 215), may also be added to the synonymy. 



*Ann. Mag. Nat. Hist. Ser. 4, xv. 419, 1875. 



