472 On Mollusca from the Bay of Bengal &c. 



Scala bengalensis (Smith). 



Scalaria benr/alensis, Smith, Ann. & Map:. Nat. Hist. 1899, vol. iv. 

 p. 246; Illust. Zool. ' Investigator,' pi. xii. tigs. 1, 1 a. 



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



Lacuna inclica, Smith. 



Lacuna indica, Smith, Ann. & Mag. Nat. Hist. 1894, vol. xiv. p. 1G5, 

 pi. iv. fig. 7. 



Hab. Off Kistna coast, 753 fath. 



The shell is white beneath an excessively thin deciduous 

 epidermis, which produces the " sordide albida" appearance, 

 as described in the original diagnosis. 



Lacuna globosa, sp. n. 



Testa globosa, tenuis, anguste umbilicata, pcllncido-alba, peri- 

 ostraco-tenuissimo induta, limo riifescerite sa?pe inerustata, lineis 

 incrementi sculpta ; anfractus quatuor, celeriter acerescentes, 

 perconvexi, ultimus antiee oblique descendens, interne circa 

 umbilicum carina prominente gracili instnictus ; apertura irregu- 

 lariter rotundata ; peristoma tenue, continuum, margine extemo 

 infra late sed haud profunde sinuato, columollari in medio levitcr 

 rctlexo et sinuato ; operculum corneum, paucispirale, anfractibus 

 3-4 construct urn. 



Diam. maj. 5 mm., min. 4, alt. 5. 



Hab. Station 212, in 111 fath. 



Within the aperture a narrow and shallow groove corre- 

 sponds with the external umbilical keel. Just above the 

 termination of the latter the peristome exhibits a broad but 

 shallow sinus. I regret being unable at present to give the 

 position of Station 212. 



Natica rnfa, Born. 



Nat lea vv fa, Smith, Ami. & Mag. Nat. Hist. 1894, vol. xiv. p. 1G5, 

 pi. iv. tigs. 14, 14 a. 



Hab. Bay of Bengal, 65 fath. 



A single specimen with rather higher spire than usual. 



Natica violacca, Sowerby. 



Natica violacca, Thilippi, Con. -Cab. ed. 2, p. 66 bis, pi. x. fig. 13. 



Hab. Off Andaman Islands, 15 fatb. {' Investigator ') ; 

 other localities are Philippines, Fiji, Mauritius. 

 No description of the operculum appears to have been 



