tt^ A - ^^,._ 



-ORNIA. 



M. ANGASI, Brazier. PI. 12, fig. 67. 



Shell hyaline lacteous ; spire nearly planate ; columella with 

 inferior folds ; lip smooth within. Length, 1*75 mill. 



Port Jackson, Australia. 



The animal is dark, with a red foot. Appears to be an im- 

 mature shell. 



M. POLYODONTA, Velain. PI. 12, fig. 68. 



White, spire almost planate, columella with two plications, 

 above which are nine or ten transverse teeth, terminating in a 

 stronger tooth above. Length, 2*5 mill. 



L of St. Paul, Indian Ocean. 



Found in compound Ascidians. Appears to be an immature 



shell. 



M. SANDWICENSIS, Pease. PL 12, fig. 69. 



Glossy white, columella usually four-plicate, lip abbreviately 

 lirate within. Length, 2*5 mill. 



Fandwfch Is. (Pease); Viti Is. (Garrett). 



Pease's species was not illustrated by him, and the figure of 

 it in Reeve's Iconica is very bad. He does not mention the 

 interior lirae or denticulations, which are not visible on all the 

 specimens. Having types received from Pease and also types 

 of Mr. Garrett's M. pygmsea, subsequently published, I do not 

 hesitate to declare them identical. 



M. DEBILIS, Pease. 



Shell subpyriform, longitudinally striated, white; aperture 

 narrow, contracted ; apex obtuse ; inner lip three-plaited, outer 



lip denticulated within. 



Sandwich Islands. 



Mr. Redfield and Dr. Weinkauff have made this a synonym of 

 M. Australis, Hinds ; although the description differs essentially. 

 Pease originally published it as M. oryza, but that name being 

 preoccupied, he changed it to M. debilis, and at .the same time 

 pointed out its distinctive characters from Australia. Dr. 

 Jousseaume, ignorant of the change of name made by Pease, 

 has proposed for it M. aquseg-utfa. It has not been figured, and 

 I have no specimens. 



