458 Mr. E. A.. Smith on Mollusca from the 



Pleurotoma (Surcula) breviplicata, Smith. 



Pleurotoma (Surcula) breviplicata, Smith, Arm. & Mag. Nut. Hist. 

 1899, vol. iv. p. 238 ; Illust. Zool. < Investigator,' pi. ix. figs. 3, 3 a. 



Hab. Station 233, off Andaman Islands, in 185 fath. 



Pleurotoma (Surcula) eurina, Smith. 



Pleurotoma (Surcula) eurina, Smith, Arm. & Mag. Nat. Hist. 1899, 

 vol. iv. p. 239 ; Illust. Zool. ' Investigator,' pi. ix. figs. 4, 4 a. 



Hab. Station 232, off South India, in 430 fath. 



Pleurotoma (Surcula) prcecipua, Smith. 



Pleurotoma (Surcula) prcecipua, Smith, Ann. & Mag. Nat. Hist. 1899, 

 vol. iv. p. 239 ; Illust. Zool. ' Investigator,' pi. ix. figs. 5, 5 a. 



Hab. Station 229, off Travancore coast, in 360 fath. 



Pleurotoma (Surcula) arcana, Smith. 



Pleurotoma (Surcula) arcana, Smith, Ann. & Mag. Nat. Hist. 1899, 

 vol. iv. p. 239 ; Illust. Zool. ' Investigator,' pi. ix. figs. 6, 6 a. 



Hab. Station 233, off Andaman Islands, in 185 fath. ; and 

 Station 229, off Travancore coast, in 360 fath. 



Pleurotoma (Surcula) Margaritce, sp. n. 



Testa fusiformis, turrita, albida, epidermide tenuissima lutescente 

 induta ; spira elongata, acuminata ; anfractus 12, in medio angu- 

 lati, nodose oblique plicati (plicis inferne attenuatis), supra con- 

 cavi, infra subconvexi, undique spiraliter tenuiter et confertiin 

 striati lineisque incrementi flexuosis tenuibus sculpti, ultimus 

 infra angulum convexus, antice breviter rostratus ; apertura 

 elongata, piriformis ; labrum tenue, valde arcuatim prominens, 

 superne late et profundo sinuatum ; columella in medio recti- 

 uscula, antice obliqua. 



Longit. 60 mm., diam. 20 ; apertura cum canali 27 longa, 8 lata. 



Hub. Off Andaman Islands, 405 fath. 



In the body- whorl there is a slight convexity or rounded 

 ridge just below the suture and above the excavation, below 

 which occur the oblique nodose plications which gradually 

 diminish in strength as the aperture is approached. 



Pleurotoma (Bathytoma) atractoides, Watson. 



Pleurotoma (Genota) atractoides, Watson, Gasteropoda ' Challenger ' 



Expedition, p. 301, pi. xx. fig. 8«-c. 

 Bathytoma atractoides, Harris, Cat. Austral. Ter. Moll, parti, p. 49. 



