Bay of Bengal and the Arabian Sea. 485 



Buccinum mitreUa, Adams & Reeve, Voy. 'Samarang,' Zool., Moll. 

 p. 32, pi. xi. fig. 13; Tryon, op. tit. p. 152, pi. lxxii. fig. 239 (as 

 Metula). 



Hub. Off Coroniandel coast, 41 fatli. 



Buccinum mitrella was originally described from the China 

 Sea. The single specimen obtained by the ' Investigator ' is 

 larger than the type, being 21 mm. in length and 7 in width. 

 The whorls also are slightly more convex. A feature not 

 referred to in the description is the presence of varices at 

 intervals up the spire, being merely the slightly thickened 

 former outer lips of the aperture. 



A careful examination of the description and figures given 

 by Hinds of his Buccinum metula and a comparison of speci- 

 mens in the Cuming collection apparently indicate that that 

 species and Buccinuni mitrella belong to the same form, 

 differing only in size. The examples of B. metula in the 

 British Museum are quite as small as that figured in the 

 ' Sulphur/ and, with the exception of size, are undistinguish- 

 able from the larger form mitrella. Hinds's locality, " West 

 coast of Ycragua," may be an error. 



Tritonidea delicata, Smith. 



Tritonidea delicata, Smith, Ann. & Mag. Nat. flist. 1899, vol. iv. p. 212 ; 

 Illust. Zool. ' Investigator,' pi. x. figs. 7, 1 a. 



Hab. Station 237, off Andaman Islands, 90 fath. 



Pisania anyusta, Smith. 



Tisania angusta, Smith, Ann. & Mag. Xat. Hist. 1899, vol. iv. p. 243 ; 

 Illust. Zool. 'Investigator,' pi. xi. figs. 1, 1 a. 



Hub. Off south coast of Ceylon, 34 fath. 



Columbella (Mitrella) supraplicata, Smith. 



Columbella (MitreUa) supraplicata, Smith, Ann. & Mag. Xat Hist. 

 1899, vol. iv. p. 214; Illust. Zool. ' Investigator,' pi. xi. figs. 7, 7 a. 



Hab. Station 232, off Travancore coast, in 430 fath. 



Columbella (Meta) philippinarum, Reeve. 



Hab. Station 237, off Andaman Islands, 90 fath. (' In- 

 vestigator ') ; Philippine Islands (Reeve) ; N. Borneo ( Ussher 

 § Everett, in Brit. Mus.). 



The ' Investigator ' specimens, coming from deep water, 

 have lost almost all the colour-markings which usually are 

 present in this species. They are dirty white, with just 



