433 MESSES. MEIiYILL AND STANDEN ON [Juiie 18, 



Dbillia puoata Eve. 



I. Karachi. 5 fathoms, loose stones and mud. 



Dbillia incebta Hinds. 



P.G. Gulf of Oman, lat. 24° 55' N., long. 57° 59' E. 205 

 fathoms, sand. Also at 37 fathoms, in contiguous sounding, sand 

 and mud. 



Dbillia inconstans Sm. 



P.G. Henjam Island. Shaikh Shuaib I. Gulf of Oman, 

 lat. 24° 55' N., long. 57° 09' E. 37 fathoms, sand and mud. 



I. Karachi. Angrias Bank and Malabar coast (Captain Tln- 

 clall). 5 fathoms. 



Dbillia intertincta Sm. 



P.G. Gulf of Oman, Maskat. 5-15 fathoms, sand or muddy 

 sand. Largest examples measure Ig inch in length. 



M.C. Extends along the Mekran Coast almost to Gwadur. 



Dbillia lucida G. & H. jVevill. 



P.G. Tumb I. M.C. GwsicXixv {W. T. Blanford). 



Dbillia nitens Hinds. 



I. Lat. 18° 58' N., long. 71° 45' E., 40 fathoms. 



Dbillia obliquata Eve. 



M.C. Local, but widely spread on the coast. 



I. Karachi. 5 fathoms. Amongst loose stones, &c. 



Dbillia omanensis, sp. n. (Plate XXIV. fig. 1.) 

 D. testa eleganter fusiformi, delicata, alba, pallide cavnea vel 

 hrunneo-tineta ; anfractibus 9, quorum ajncales vitrei, interdum 

 carnei, loivissimi, cceteris longitudinaliter crassicostatis, costis 

 anfractus penultimi circa novem, idtimi decern, undique sjpiraliter 

 delicatissitne striatis, striis nitidis ; apertura oblonga, alba, labro 

 sinuoso,paullum effuso, sinu juxta marginem suturalem perlato; 

 columella alba, nitida, recta, canali paullwm producto. 

 Long. 14, lat. 4*50 mm. 



Eab. Gulf of Oman, lat. 24° 55' N., long. 57° 59' E. 37 

 fathoms, sand and mud. 



Three of the species of Drillia here described, viz. D. atJiyrma, 

 clydonia, and omanensis, possess certain features ol' form in common, 

 but entirely differ in all other particulars. The last named, now 

 under consideration, is white, pale flesh-colour, or tinged with 

 brown, the ribs themselves usually being white, of a very elegant 

 fusiform contour ; the whorls are nine in number, two or three 

 being apical, colourless, and crystalline, or else brown-tinged, the 

 remainder thickly ribbed ; the chief characteristic of the species 

 being the very fine, conspicuous, and delicate spiral liration, 

 these lirse imparting a sericeous appearance to the whole surface. 

 A good many examples were dredged. We may add that 



