1901.] MOLLUSKS PROM THE PERSIAIf GULP, 437 



Two examples were dredged at the above locality. A very 

 beautiful spirally carinate and lirate BrilUa, allied to the Medi- 

 terranean D. loprestiana, and not, indeed, unlike in character 

 to certain Surculce, e. g. S. annulata Reeve, cincta Lam. ; but the 

 short canal and wide sinus proclaim it rightly placed in Drillia, 

 and the acute carinae are peculiar. 



Deillia cltdoniaI, sp. n. (Plate XXIII. fig. 24.) 

 D. testa atteyiuato-fusiformi, delicata, albo-straminea velrufescente ; 

 anfractihus 9, quorum apicales duo perlceves, vitrei, albi vel 

 brunneo-suffusi, cceteris angulariter prominulis, ventricosis, 

 7iitidis, longitudincditer costatis, costis obliqui-fiexuosis, leniter 

 sjnraliter sub lente striatidis ; aper-tura oblonga, sinu perlato, 

 labro tenui; columella recte incrassata, supra callosa, nitida, 

 canali lato, paidlum producto. 

 Long. 15, lat. 5 mm. 



Hab. Gulf of Oman, lat. 24° 49' N., long. 51° 56' E, 225 

 fathoms, mud. 



Several examples of a shining, nearly smooth, pale, whitish, 

 straw-coloured, or reddish-tinted shell, attenuate, graceful, nine- 

 whorled, with longitudinal ribs, somewhat prominently twice- 

 angled just below the middle, and obliquely flexuose, shining, and 

 almost smooth. On the penultimate whorl the ribs number 11, on 

 the body-whorl 10. The spiral revolving lines are discernible with 

 a lens. The mouth is oblong, sinus very wide and somewhat 

 shallow ; outer lip thin, rounded ; columella white, straight, 

 callous above, shining ; canal a little produced, broad. 

 Not exactly comparable with any species known to us. 



Drillia OREisruLAEis Lam. 

 Var. griffithii Gray. 



P.G. Gulf of Oman, Jask, on hard sand. 



M.C. Charbar, at low spring-tides. 



I. Karachi, Specimens washed up all along the coast. The 

 var. griffitliii occurs with the type near Charbar and Jask. 

 Var. atJcinsoni Sm„ 



I. Bombay, where it appears the common form, though the 

 type has been also recorded (Abercrombie). Lt.-Col. Olivier has also 

 collected the typical form at Bassein, near Bombay. 



Drillia bisjecta Sm. 



P.G. Gulf of Oman, Maskat. 10 fathoms, muddy sand. 

 Akin to D. persica Sm., but more local. 



Drillia elevata Sm. 

 P.G. Bushire. 10 fathoms. 

 Drillia flavidula Lam , 



P.G. Gulf of Oman, Malcolm Inlet (Kubbatt Ghazira). 

 Very uncommon, at 24 fathoms. 



^ kXvSmv, a wave. 



