OCINEBRA. 123 



has recently substituted the name Adamsi a name which is itself 

 pre-occupied by Kobelt for alabastrum, Ad., not Reeve. 



M. SOLJDUS, A. Adams. PL 37, fig. 430. 



Shorter and thicker than M. pudicus, the fronds more rudi- 

 mentary, the aperture smaller, canal more completely closed. 

 White. Length, 28 mill. 



Habitat unknown. 



Very probably a mere variety of M. nuceus or pudicus. 

 M. JAMAICENSIS, Sowerby. PL 37, fig. 432. 



Varices eight, distant, narrow, interstices deeply cancellated. 

 Reddish-brown. Length, 20 mill. 



Jamaica. 



I have not seen this species ; which is most readily distin- 

 guished from others of same form and sculpture by its color. 



M. CASTUS, A. Ad. PL 37, fig. 433. 



Varices seven; rounded, shell globose-oval ; white. Length, 



18 mill. 



China. 



Belongs to the cyclostoma group and appears to be distin- 

 guished by its shorter form and more numerous ribs. 



M. INCISUS, Brod. PL 37, figs. 436, 437. 



Five to seven varicose, varices thick, rounded. Shell white, 

 crossed by chestnut-colored revolving ribs. Length, 1*25 to 1-5 

 inch. 



St. Elena, W. Columbia, 8 fathoms, Cuming ; Catalina Isl., California, 



W. M. Gabb. 



Reeve's figure is somewhat suggestive of the preceding species ; 

 that of Sowerby (Conch., 111.) is much better. One of the speci- 

 mens obtained by the late Mr. Gabb, at Catalina Isl., is still 

 larger than the latter figure, and corresponds to the figure of 

 M. gemma, Sowb. (Thes. Conch.), fig. 437. It looks enough 

 different, at first sight, to constitute a distinct species, but the 

 differences appear to be due to the eroded or beach-worn condi- 

 tion of the gemma form. 



M. MACULATUS, Reeve. PL 37, fig. 442. 



Ovate, pyramidal, spire elevated ; whorls well rounded, tuber- 

 culately varicose and finely ridged ; aperture oval, small ; canal 



