1901.] MOI-LUSKS PROM THE PERSIAN GULE. 441 



Drillia turris Hve. { = Pleurotoma jjagocla Eeeve). 

 P.G-. G-ulf of Oman, Maskat. 

 I. Karachi, but very rarely. 



Drillia variabilis Sm. 



P.G. Gulf of Oman, lat. 23° 50' N., long. 27° 50' E. Soft 

 mud. 



I. Karachi, smaller examples near the mouth of B.. Indus, 

 3 fathoms, sand and mud. 



This species has also been received by us from the Red Sea 

 (Toiunsend) and the Andaman Isles {Booley). 



Drillia (Clavus) orassa Sm. 

 I. Bombay (Abercrombie) . 



Drillia (Clavus) pr^clara Melv. 



I. Bombay, up the coast {Abercrombiej. 



Mangilia averina, sp. n. (Plate XXIV. fig, 5.) 

 M. testa ovato-fusiformi, alba, solida ; anfractibus 7, quorum 

 apicales duo loives, albi, cceteris regulariter recticostatis, costis 

 crassiusculis, in ultimo circa septem, undique spiraliter arete 

 liratis, liris alternatim tenuibus vel fortibus, ultimo anfractu 

 longitudine cceteros excequante ; apertura anguste ovata, labro 

 incrassato,sinu lato, brevi; columella fere recta ; peristomate omni 

 aurantio-suffuso. 

 ^Long. 6, lat. 2*75 mm. 

 Hob. Karachi. 



A stout, pure white little Mangilia, with strong ribs, crossed 

 by alternate strong or thin lirse, and gemmuled at the points of 

 junction. The lip and columellar area are beautifully suffused 

 with orange-yellow. 



Mangilia caedinalis Reeve. 



I. Karachi. 3 fathoms, loose stone bottom. 



Mangilia OHILOSEMA Melv. 



P.Gr. Henjam Island. 15 to 20 fathoms, mud. 



M.C. In several places oft' the coast at 10-15 fathoms. 



I. Karachi. Exceedingly abundant among loose rocks, 

 sand, and mud at low tide. Bombay {Abercrombie) is shell-sand. 



The aihinties of this species lie with the New Caledonian 

 M. himerta and Jiimerodes M. & S., and perhaps with the 

 Mediterranean M. vauquelini Payr. 



Mang LI a crassilabeum Rve. 



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

 3 fathoms 

 I. Karachi. 



Mangilia DEOiPiBiirs Sm. 



I. Bombay (^Abercrombie), in shell-sand, mostly worn. 



