1901.] MOLLUSKS FROM THE PERSIAN GULF. 437 



Two examples were dredged at the above locality. A very 

 beautiful spirally carinate and Urate DriUia, allied to the Medi- 

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

 to certain Surcido?, e. g. S. annulate Reeve, eincta Lam.; but the 

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

 and the acute carina? are peculiar. 



Deillia cltdonia 1 , sp. n. (Plate XXIII. fig. 24.) 

 D. testa attemiato-fusiformi, delicata, albostrammea vel rufescenU ; 

 anfractibut 9, quorum apiaries dvo perlcevea, vitrei, albi vel 

 hnmneo-suffusi, (.uteris angulariter prominuliSi ventricosis, 

 nitidis, longitudinaliter costatis, cost is obliqui-jlexuosis, leniter 

 Sjiiraliter sub lente striutidis ; apertura oblonya, sinu perlato, 

 labro tenui; columella rede incrassata, sujyra callosa, nitida, 

 canali lato, paullum producto. 

 Lowj. 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, siuus very wide and somewhat 

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

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

 Xot exactly comparable with any species known to us. 



Dkillia crexularis Lam. 

 Var. griffitltii 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. yriffithii occurs with the type near Charbar and Jask. 

 Var. atlcinsoni 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 disjecta Sm. 



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

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



DuiJJ.I I LU.VATA Sm. 



I'.G. Bushire. 10 fathoms. 



Driu.i \ i i.w im i.v Lam. 



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

 Very uncommon, at 24 fathoms. 



1 %K.boittv. \\ \mivi'. 



