433 MESSRS. MELYILL AND STAXDEX OH [June 18, 



Deillia flcata Eve. 



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



Deillia incebta Hinds. 



P.G. Gulf of Oman, lat. 2A' J 55' N., long. 57° 59' E. 205 



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

 and mud. 



Deillia ixcoxstans .Sm. 



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

 lat. 24° 55' N., long. 57 c 09' £. '6~ fathoms, sand and mud. 



I. Karachi. Angrias Bank and Malabar coast {Captain Tin- 

 dall). 5 fathoms. 



Deillia inteutincta Sm. 



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

 sand. Largest examples measure 1| inch in length. 



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



Deillia luoxda G. & H. Xevill. 



P.G. Tumb I. M.C. Gwadur (W. T. Stanford). 



Deillia xitexs Hinds. 



I. Lat. 1S C 58' X., long. 71° 45' E., 40 fathoms. 



Deillia obliquata Rve. 



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



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



Deillia omaxexsis, sp. n. (Plate XXIV. fig. 1.) 

 D. testa eleganter furiformi, delicata, alba, pallide earned vel 

 brunneo-tincta ; anfraetibus 9, quorum apicales vitrei, interdum 

 carnei, Icevissimi, eceterig longitudinaliter crassicostatis, costis 

 anfractus penultimi circa novem, ultirni decern, undique spiraliter 

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

 sinuoso, paullum effaso, sinu juxta marginem suturalem perlato; 

 columella alba, nitida, recta, canali paullum producto. 

 Long. 14, lat. 4*50 mm. 



Bab. Gulf of Oman, lat. 24° 55' X., long. 57° 59' E. V,l 

 fathoms, sand and mud. 



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

 clydonia, and omanensis, possess certain features of 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 lirae imparting a sericeous appearance to the whole surface. 

 A good many examples were dredged. We may add that 



