Bay of Bengal and the Arabian Sea. 163 



suturam carina tuberciilata cincti, in medio angulati, serie nodu- 

 lorum ornati, Hris tenuibus spiralibus paucis lineisque incrementi 

 floxuusis sculjjti, liris inl'ra aiiguliiin minute nodulosis, anCr. 

 ultimus infra poriijlierium liris transversis 14—15, partim nodu- 

 losis, cinctus ; aportura parva ; labrura tenue, supra angulum 

 baud profuiide sinuatum, infra arcuatira prominens; coluuiella 

 subrt'cta, caUo tenui induta ; canalis brovis. 

 Longit. 18 mm., diam. 6 ; apertura cum canali 6 longa, 2| lata. 



Hab. Station 2G9, W. of Cape Comorin, 464 fath., green 

 mnd and sand. 



Only a single example obtained. Tlie lines of growth are 

 rather strong and very Hexuous, and on passing the dclieate 

 spiral lirae, except in the coneavity above the angle of the 

 whorls and at the base of the body-whorl, are delicately 

 nodulous. The last volution below the nodose periphery has 

 about fifteen lirre, of which about six of the upper ones are 

 nodulous, the rest, around the anterior contracted portion, 

 being simple and thread-like. The tubercles on the angle 

 are about eighteen in number, and the lirae above it three or 

 four. 



Pleurotoma {Surculd) exstructa, Martens. 



Surcula exstructa, 'Ma.Ttena, Deutsch. Tiefsee-Exped. ' Valdivia,' vol. vii. 

 p. 81, pi. i. fig. 4. 



Hab. Station 280, off Cororaandel coast, 446 fath. ; also 

 Station 331, off Andaman Islands, 569 fath.; off the 

 Nicobar Islands (Martens). 



Pleurotoma [Surcula) arcana, Smith. 



Pleurotoma {Sureula) arcana, Soiith, Ann. «& Mag. Nat. Hist. 1899, 

 vol. iv. p. 239 ; 1904, vol. xiii. p. 458 ; Illust. Zool. ' Investigator,* 

 pi. ix. tigs. 6, 6 a. 



Hab. Station 276, W. of Ceylon, 1006 fath. ; also Station 

 310, N.E. of Andaman Islands, 960 fath. 



Only two specimens, with the apical whorls eroded. 



Pleurotoma [Ancistrosyrinx) travancorica, Smith. 



Pleurotoma {Ancistrosyrinx) travancorica, Smith, Ann. & Mag. Nat. 

 Hist. 1896, vol. xvi'ii. p. 368; 1904, vol. xiii. p. 459; Illust. Zool. 

 ' Investigator,' Mollnsea, pi. vii. figs. 1, 1 a. 



Hab. Station 259, W. of Malabar coast, 295-360 fath., 

 green mud and sand. 



