44 GIBBERUL'A. 



M. Lavalleana, d'Orb (fig. 61), from the West Indies and 

 Florida, does not appear to differ. The lip is described as 

 smooth, and appears to be so in some specimens, but in others, 

 in a favorable light and with a good glass, the denticulations or 

 ridges can be plainly seen. M. minima, Guilding (fig. 62), is 

 also a synonym, although described as having but three columellar 

 plaits. I place here M. Sueziensis, Issel (fig. 63), from the Red 

 Sea. 



M. LACHRIMULA, Gould. 



An unfigured, white, minute species, with scarcely any 

 apparent spire, and lip surpassing it posteriorly; columella 

 tour-plaited; lip slightly crenulate within. Length, 1*5 mill. 

 Dredged in 400 fms. off the coast of Georgia. 



Said to be distinguished from the allied West Indian species 

 by its transparency and ventricose form. 



M. BENSONI, Reeve. PI. 12, fig. 64. 



Rather solid, shining white; lip smooth, columella three- 

 plaited. Length, 2 mill. 



Cape of Good Hope. 



M. MINOR, C. B. Adams. PI. 12, fig. 65. 



White, columella four- or five-plaited, lip smooth within. 

 Length, 3-4 mill. 



Panama to Mazatlan. 

 More cylindrical than M. minuta, Pfr. 



M. POLITA, Carpenter. 



Shell like M. minor, but smaller, regularly ovate, scarcely 

 produced anteriorly, spire rounded, hardly raised ; parietal callus 

 small ; plicae four, nearly equal and conspicuous. 



Length, -034 inch. 



Mazatlan; six specimens on Chama and Spondylus. 



I have not seen this species, which remains unfigured. 



M. TRANSLATA, Redfield. PI. 12, fig. 66. 



White, with three luteous bands ; lip denticulated within. 



Length, 6 mill. 



Paumotus Is. 



Described by Pease as M. pyriformis* a name preoccupied by 

 Carpenter. . 



