1901.] XIOLLUSKS FROM THE PERSIAN GULF. 435 



Pleurotoma (Oligotoma) violacea Hinds. 



I. Karachi. Inside the harbour in 3-7 fathoms, loose stones 

 and mud. 



P. vertebrata Sin., occurring also at Karachi, is perhaps only 

 varietal. 



Surcula australis (Lam.). 

 I. South of Bombay (Lt.-Col. U. D. Olivier). 

 Some little doubt exists as to the exact locality for this species, 

 which has its headquarters in China and the Philippine Isles. 



Subcula catena Reeve. 



M.C. In young condition 5-10 fathoms ; fine adult examples 

 20-30 fathoms : all on very soft mud bottom. Generally distri- 

 buted. 



Surcula cixgulifera Lam. 



P.Gr. Generally distributed in the Gulf, extending to the Gulf 

 of Oman, 5-15 fathoms, sandy mud. The largest examples, If- 

 inch in length, occurred in lat. 26° 50' N., long. 54° 50' E. 

 Yar. amicta Sm. 



I. Bombay (Abercrombie), Bassein and Bombay Harbour as far 

 south as Goa (Lt.-Col. H. D. Olivier). 



We cannot separate Pleurotoma cincta Lam. 



Surcula javana L. (=aodifera Lam.). 



I. Karachi. Rare. Bombay (Abercrombie). Cast ashore very 

 frequently, and often in good condition, after stormy weather, 

 thence southwards to Panjim and Goa (Olivier). 



Surcula tornata Dillw. 

 Var. fulminata Kien. 



M.C. Generally distributed over the Persian coasts and those 

 of Baluchistan. 



I. Karachi. Bomba) r (F. W. T., Abercrombie). Bassein and 

 Bombay Harbour southwards to Goa (Olivier). 



Surcula tcberctlata Gray. 



M.C. A common species at 5-30 fathoms, soft mud ; the most 

 perfectly developed specimens coming from the greater depth. 



Dbillia angriasensis Melv. 



I. Angrias Bank (Captain W. A. Tindall), 



I > i ; 1 1 . i . i \ \i.( iyokba, ap. n. ( Plate XXIII. Sg. 21.) 

 D. testa gradato-fu&iformi, nitidissima, Candida, unvcdlore; anfrao- 

 ill, ns .-:* /iti m, quorum apicalis ipse vUn U8,lamiseimu8 t duobuehine 

 proximia u/m,/ medium actUicarinatis, cceteria recticoetalis, 

 costie nitidis, epiraHter in antepenultimo W-, >n penultimo 

 aniractu trttiratu, nil nun indistincti quinque-lirato, costie ad 

 ,!,,,., evanidie, inde ad basim attenuato, multistriatulo i 



28* 



