184 G. & H. Nevill — New Species of Marine Mollusca. [August, 



thickly ribbed, ribs obsolete on the back of the last whorl, which is trans- 

 versely striated at its base ; columella with a sharply defined callosity, outer 

 lip scarcely thickened, not as long as the columella ; aperture very narrow. 

 Long. 3, diam. 1 mil. Burma. 



Sistrum ventricosulum. 



The smallest species known of the genus, very gibbous, ovately ventricose, 

 thick, abruptly attenuated at base ; spire short, acute, about \ the size of 

 the last whorl ; white, stained with brown ; whorls seven, with two rows of 

 prominent pointed granules, the lower row the larger ; canal long, not 

 recurved ; four tubercles within the aperture, the two upper ones very pro- 

 minent ; outer lip remarkably thickened, slightly emarginate above. 



Long. 5f, diam. 3^- mil. Ceylon. 



Eulima acuformis. 



Very elongate, sharply pointed, fiexuous ; whorls 17, cylindrical, slightly 

 angulate at their base, except the last whorl which is short and rounded ; 

 varices obliquely continuous. Allied to E. lactea and flexuosa of A. 

 Adams. 



Long. 10, diam. 2f mil. Andamans. 



Missoina (?) abnormis. 



Small, thick, shortly fusiform, white ; apex remarkably truncately 

 sinistral ; whorls six, longitudinally ribbed, more or less obsolete towards 

 the base of the last whorl, throughout transversely closely and rugosely 

 striated ; columella strongly twisted at base, covered with a moderate callo- 

 sity ; aperture small, peculiarly deeply channeled at base ; outer lip pro- 

 duced and rounded, very thick, transversely striated, crenulated at the 

 margin- 

 Long. 3, diam. 1^ mil. Mauritius. 



Cyclostrema ebumea. 



Depressly orbicular, thick ; whorls five, sharply angled below their 

 centre, longitudinally obliquely plicated, obsoletely granulated at the an- 

 gulation, interstices very closely transversely striated ; a remarkable very 

 prominent, thick keel at the periphery, sculptured like the whorls ; f of the 

 base also sculptured as above, smooth on the remaining -| round the um- 

 bilicus ; umbilicus moderate, partially covered by the thickened columella. 

 Allied to Maryatt's O. ccmcellata. 



Alt. 2|, diam. 4f mil. Puri. 



The following synonyms are also recorded : 



Columbella lactescens, Souv. = Columbcllapardalina, Lam. var. 



Murex Crosseana, Lien, = Latirus ffibbus, Pease. 



