162 M1TROIDEA. 



Unfigured Species. 

 T. JACULANDA, Gould. Allied to T. recurva, Reeve, but the ; 



sculpture is much more delicate. China Seas. 



T. SALT ATA, Pease. Polynesia. 



T. EXQUISITA, Garrett. Polynesia. 



T. VIOLACEA, Garrett. Polynesia. 



Genus MITROIDEA, Pease. 



The peculiar tubular and recurved anterior portion of the 

 columella, the truncate outer lip, the numerous small columellar 

 plaits, the smooth surface and outer lip will distinguish this 

 genus upon conchological characters, although the animal and 

 its dentition do not differ from Mitra. Mitroidea has four years' 

 priority over Mauritia, A. Adams. The two species which H. and 

 A. Adams included in their subgenus Mutyca, also belong here. 

 If Mutyca had a sufficient diagnosis it would be entitled to 

 precedence over Mitroidea on account of priority of publication, 

 but its authors only perceived a portion of the characters of the 

 group and made it an artificial section of Mitra. Mitroidea is 

 closety allied to Dibaphus, but the latter has a shorter spire and 

 is without columellar plaits. 



M. MULTIPLICATA, Pease. PI. 41, figs. 312, 313. 



White, solid, polished under a thin light olive epidermis, with 

 distant brown revolving lines and band-like maculations. 



Length, 1-2 inches. 



Polynesia ; Mauritius. 



Mr. Pease's species has never been figured, but the careful 

 descriptions by himself and Garrett and the fact that he, like 

 Adams, made his species the type of a new genus, leaves no 

 doubt that M. Barclayi, H. Adams is synonymous with it. 

 Dibaphus Lwbbeckeanus , Weinkauff (fig. 313), is the juvenile of 

 this species. Sowerby, who does not mention Pease's prior 

 name, changed M. Barclayi to M. Dibaphiformis, on account of 

 the alleged prior publication of Mitra Barclayi, Hanley. 



M. ANCILLIDES, Swainson. PI. 41, fig. 314. 



Pale fulvous yellow, or creamy white ; upper whorls minutely 



granulated. Length, 20 mill. 



Paumotus hies. 



