7>V/y of Bengal and the Arabuin Sea. 161 



Station 2u9, W. of Malal)ar coast, 295-300 fatli., green nnid 

 and sand ; Station 341, Gnlt' of Oman, 230 fatli. 



These specimens have the peculiar nodule or swelling on 

 the upper i)art of the columella referred to in tlic case of the 

 Ceylon examples. Operculum nornuilj unguiculate. 



Pleurotoma vuyatu, Smith. 



rieiirotmna vagata, Smith, Ann. & Mag. Nat. Hist. 1895, vol. xvi, 

 p. 3, pi. i. fig. 3; 1904, vol. xiii. p. 450. 



Hub. Station 259, W. of Malabar coast, 295-3G0 fath., 

 green mud and sand; also Station 337, oft" Malabar coast, 

 271 fath. 



Pleurotoma optata, Smith. 



I'leuroioma optata. Smith, Ami. & Mag. Nat. Hist. 1899, vol. iv. p. 238 ; 

 1904, vol. xiii. p. 45(3 j llliist. Zool. 'Investigator,' pi. ix. tigs. 1, 1 a. 



Hah. Same as preceding species, and Station 332, off S. of 

 Andaman Islands, 279 fath. 



Pleurotoma prcesiynis, Smitli. 



Pleurotvma prcesignis, Smith, Ann. & Mag. Nat. Hist. 1895, vol. xvi. 

 p. 4, pi. i. tig. 4. 



Hab. Station 281, off Coromandcl coast, 300 fath. 

 One specimen agreeing exactly with the type from deep 

 water off' Ceylon, 



Pleurotoma (Surcida) Nereis, sp, n. 



Testa fusiformis, alba, epidermide tenui grisea induta ; anfractus 9 ?, 

 superiores detriti, reliqui supra declives, in medio angulati, infra 

 augulum constricti, rectiusculi, leviter plicati, spiraliter tenuiter 

 lirati, plicis inferne attenuatis, vix ad suturara producti, ultimiis 

 antice augustatus, uudique transversim liratus ; apertura elongata, 

 antice aiigustata, producta, canaliculata ; labrum tenue, supra 

 prope suturam miuime profunde siuuatum ; columella rectiuscula, 

 leviter siuuosa. 



Longit. 35 mm., diam. 13| ; apertura cum canali 18 longa, 6 lata, 



Hab. -Station 331, off Andaman Islands, 569 fath, 

 A single speciuieu only. The longitudinal costce are very 

 fine, oblicpxely arcuate above the angle, subnodose at the 

 angulation, and atteuuated below, so that they hp.rdly reach 

 to the suture. The labral sinus is very shallow indeed and 

 the shell has a general Belseform aspect. 



