1901.] MOLLrSKS EBOM TUE PERSIAN GULF. 373 



Fain. Adeoebid.e. 

 Adeobbis placets, sp. n. (Plate XXII. fig. 15.) 

 A. testa depressa, umbilicata, albo-vitrea, tenuissima, minuta ; 

 anfractibus quatuor, apicali vitreo, nitido, undique concentrice 

 gpira&iter tenuistriaiis, apud suturas pauUum impresso-exeavatis, 

 ultimo rapide accrescent?, circa umbilicum nitido, perlcevi ; 

 apertura rotunda; peristomal via) inerassato, margin* columellari 

 cepto, circa umbiUcton triantjulatim rejiexo. 

 Alt. 50, diam. 1 - 5U mm. 



Hah. Gulf of Oman : lat. 24° 05' N., long. 57° 35' E. 205 

 fathoms. 



One of the minutest of a genus replete with " minutiora." We 

 should consider its nearest congener A. clausns Adams, from Japan ; 

 but this species, besides being less depressed, is more than double 

 the diameter. Several specimens occurred in the above locality, 

 and would appear to have attained their full growth. One indeed 

 bears the round bore-hole, showing its inmate had succumbed to 

 the attack of a carnivorous enemy. 



Yar. complaxata, nov. 



Testa ut in typo., seel undique planata, nitida, perlcevi. 



Hob. Persian Gulf : Eishire. 



Till more examples are obtained, we prefer considering this a 

 varietal form. It is possible that it is a nearly allied but separate 

 species. Upon one of the specimens before us of the type, we 

 have lately noticed absence of the usual striae round the inner 

 dorsal surface of the body-whorl. 



Adeoebis taxieoeoides Mel v. 

 I. Bombay (Abercrombie). 



Fam. CEEnniiDiE. 



CeBITHIUM ADEXENSE Sowb. 



P.G. Bunder Abbas (21. F. Houssaij). 



Ceeitiiium boenii Sowb. 



I. Karachi. On rocks at low tide. 



(/l. KITH MM CERULEUM Sowb. 



P.O. Buahire. 



I. Karachi, with 0. bornii. 



Ceeitiiium ULTPBOMOBUB Jouss. 

 P.G. Bunder Abbas | M. /•'. Hovmay). 



1. Karachi. 



CEEinill M I.I.MMSi \TI\I O uo y- 



I. Karachi, along with 0. borrm 



