40 PKKSKTLA. 



M. OVULUM, So\vb. PI. 11, fig. 35. 



White. Length, '8 mill. 



E. Australia. 

 M. OCCULTA, Monterosato. PI. 11, fig. 36. 



Whitish. Length, 2-3 mill. 



Palermo, Sicily. 

 M. PISUM, Reeve. PL 11. fig. 37. 



White. Length, 4 mill. 



Australia (Grange). 



It would be difficult to show any good distinctive characters 

 between this and M. occulta. It might also be a young M. 

 ovulum. 



M. CLANDESTINA, Brocchi. PI. 11, fig. 38 ; PL 2, fig. 10. 



Glassy white, obovate, spire immersed, columella four-plaited, 

 outer lip thickened and margined. Length, 3 mill. 



Coast of Portugal; Canary Islands; Mediterranean 



Sea, from Gibraltar to Egypt. Fossil in 



the tertiary of Italy and Sicily. 



M. ISSELI, Nevill. PL 11, fig. 39. 



White, more elongated than M. clandestina, and smaller. 



Length, 1'25 mill. 



Suez (Issel); Coast of Persia, 25 fathoms (Blanford). 



Described by Issel as M. pygmsea, a name preoccupied by 

 Sowerby. 



M. ORYZA, Lam. PL 11, fig. 40. 



Whitish, or yellowish white, with a broad central chestnut 



band. Length, 8 mill. 



Senegal; Cape Verd Is. 



Specimens before me, agreeing otherwise with the figures of 

 this species, have the spire apparent, although short. There 

 are four columellar folds, and in addition a number of trans- 

 verse denticulations extending nearly the entire length of the 

 inner lip. Remarking the presence of these, not mentioned in 

 Lamarck's description, Jousseaume adopts Adanson's name for 

 the species and calls it M. xtipon, believing it to differ from M. 

 oryza. 



M. DENS, Reeve. PL 11, fig. 41. 



Pear-shaped, opal-white. Length, t mill. 



Borneo. 



