MELVILL : NEW SPECIES OF MITRA. 287 



Shell small, ovato-scalariform, spire obtuse, longitudinally 

 much-ribbed, ribs large, interstices striated, of a light pink 

 colour, banded with a white belt, columella three-plaited. 



A very small, brightly coloured species, of which I possess 

 the only two specimens yet discovered. In both of them the 

 outer-lip is damaged. It belongs to the section Pusia (Swn.). 



Mitra zythochroa nov. sp. PI. ii, fig. 24. 



M. testa oblongo-acuminata, attenuata, spira fusiformi, longitudi- 

 naliter costulata, ad suturas unipltcifera, costis Icevigatis, 

 interstitiis obscure sirtatis, fidvescente, albo balteo cingulata, 

 columella quijiqueplicata. 



Long. 10 mill., I at. 5 mill. 



Habitat ? 



Shell oblong, acuminate, somewhat attenuate, spire spindle- 

 shaped, longitudinally ribbed, plicate at the suture, the ribs 

 smooth, interstices between the ribs obscurely striate, yellowish- 

 tawny, banded with a white belt, columella five-plaited. 



An interesting littleadditiontothesub-genus Pusia, having, in 

 common with the well-known M. turben (Reeve), the peculiarity 

 of the mouth being imperfect, the shell having apparently been 

 broken away during the life-time of the animal. 



Mitra fulvosulcata nov. sp. PI. ii, fig. 25. 



M. testa ovata, solida, spira subacumifiata, anfjactibus longitudi- 

 naliter costellatis, costis numerosis, lotundatis, transvejsim 

 sulcatis, sulcis fulvescentibus p7-cesertiiti apud costas, columella 

 quadriplicata. 



Long., in spec. t?iaJore, 14 mill., lat 6 mill. 



Hab. : I. Mauritius. 



Shell ovate, solid, spire somewhat acuminate, whorls longi- 

 tudinally ribbed, ribs numerous, rounded, transversely furrowed, 

 the furrows being tawny coloured, especially conspicuous on the 

 ribs, columella four-plicate. 



I possess two specimens of this little shell, one mature, 

 the other not fully grown — and have seen others. The specific 

 name I have adopted is that given some time since in MS. by 



