VOLVAIUA. 55 



Jousseaume changed the name to M. ruhrofaaciata^ on account 

 o^ Peraicula 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. viastelina, Angas. 



M. Baylei, Jousseaume. PL 13, fig. 35. 



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



Length, 12 mill. 



Locality unknown. 

 M. GRACILIS, C. B. Adams. PI. 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. hibalteata^ that I 

 think Mr. Redfield is cori'ect in making the latter a synonym. 



M. ALBOLiNEATA, d'Orb. PI. 13, fig. 3t. 



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, 6-7 mill. 



West Indies, Lower California. 



M. Delesserfiana^ 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 31. 

 Delesf<ertiana, and which comes from Guadeloupe, W. I., is a 

 31. alhoHneata. This is the 31. varia, Sowerby, of Carpenter and 

 Californian conchologists. Carpenter says that it is not to be 

 distinguished from some West Indian specimens of 3f. varia^ but 

 the fact is that if. varia is made up of two very distinct forms, 

 namely 31. alhoUnenta^ Orb., and 31. avena, Val. — the latter has 

 not been found on the West Coast of America. 



Unfigured and Undetermined Specie.'^. 



M. TENERA and M. intermedia of Menke. 



M. asphari, Theobald. Undescribed. 



M. MiCROSCOPiCA, Tapparone-Canefri. Papuan Isles. 



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



TicuLATA, Tate. All from South Australia. 



M. viTTATA (name preoccupied\ M. albescens, Hutton. 



Both from New Zealand. 

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



