VOL V ART A. 55 



Jousseaume changed the name to M. rubrofasciata, on account 

 of Persicula fasciata, Schum., which is a synonym of M. per- 

 sicula, Linn. I have no authentic specimen of this species ; it 

 needs to be compared with M. mastelina, Angas. 



M. BAYLEI, Jousseaume. PI. 13, fig. 35. 



Bulliform, opaque ; luteous white ; columella three-plaited. 



Length, 12 mill. 



Locality unknown. 

 M. GRACILIS, C. B. Adams. PL 13, fig. 36. 



White, three-banded with chestnut. Length, 6*5 mill. 



West Indies. 



Prof. Adams did not illustrate his species, but the description 

 so completely agrees with Reeve's figure of M. bibalteata, that I 

 think Mr. Redfield is correct in making the latter a synonym. 



M. ALBOLINEATA, d'Orb. PL 13, fig. 37. 



White, more or less broadly three-banded with bright chest- 

 nut ; sometimes the bands are so broad that the shell appears 

 to be chestnut-colored with two white bands. Length, 6-t mill. 



West Indies, Lower California. 



M. Delessertiana, Recluz, an unfigured species, said to come 

 from Mauritius, resembles this species, but cannot be positively 

 identified with it. The shell which Weinknuff figures for M. 

 Dele user tiana, and which comes from Guadeloupe, W. I., is a 

 M. albolineata. This is the M. varia, Sowerby, of Carpenter and 

 Cali fora ian conchologists. Carpenter says that it is not to be 

 distinguished from some West Indian specimens of M. varia, but 

 the fact is that M.varia is made up of two veiy distinct forms, 

 namely M. albolineata, Orb., and M. avena, Val. the latter has 

 not been found on the West Coast of America. 



Unfigured and Undetermined Species. 



M. TENERA and M. INTERMEDIA of Menke. 



M. ASPHARI, Theobald. Undescribed. 



M. MICROSCOPICA, Tapparone-Canefri. Papuan Isles. 



M. TRIDENTATA, M. SUBBULBOSA, M. ALB1DA, M. CYMBALUM, M. DEN- 



TICULATA, Tate. All from South Australia. 



M. VITTATA (name preoccupied" 1 , M. ALBESCENS, Hutton. 



Both from New Zealand. 

 M. TANTILLA and M. LEPIDA, Gould. China Sea. 



