1879.] MR. E, A. SMITH ON MOLLUSCA FROM JAPAN. 209 



verse bands of the same colour spotted with white, one above and the 

 other below the suture. The body-whorl has a third similar band 

 near the middle, and is obliquely finely grooved at the base. The 

 banding upon the specimen from station 30 is less definite, and the 

 form of the shell, too, is rather more slender. 

 Length 12 millims., diam. 5. 



65. CoLUMBELLA (Zafra) subvitrea. (Plate XX. fig. 43.) 



Shell fusiformly ovate, subpellucid, white, with a thin indistinct 

 brown line interrupted by the costse around the lower part of the 

 whorls, and a transparent pellucid zone at the top, with a second 

 band or series of short flames just below the middle of the last whorl, 

 which is stained with brown at the extremity. Whorls 7, the first 

 two convex, smooth, the following two or two and a half almost flat 

 and likewise smooth, the rest strongly costate ; costoe about eleven 

 on a whorl, rounded, a little oblique, and more or less arcuate, 

 narrowed and subobsolete at the upper extremity, disappearing a 

 little below the middle of the body-whorl, the lower extremity or 

 Cauda of which is transversely and a little obliquely sculptured with 

 five or six striae, whereof the two or three uppermost are wider apart 

 than the rest. Aperture narrow, occupying rather less than half the 

 shell's entire length ; labrum thin, faintly and broadly emarginate, or 

 sinuated just beneath the suture, smooth within ; columella a trifle 

 oblique, tinged with brown, a little convex or swollen at the middle, 

 covered with a thin callosity with a defined margin, which unites at 

 the upper extremity with the termination of the outer lip ; basal 

 canal short, rather deep, and in a slight measure recurving. 



Length 4 millims., width I|. 



Hab. Station 25. 



The genus Zafra is described by A. Adams in the 'Annals and 

 Magazine of Natural History,' 1860, vol. vi. p. 331. He considers 

 that it belongs to the Turridse or Pleurotomidse. In his description 

 he does not state whether the labrum bears internal lirse or denticles. 

 I have examined a specimen of the typical species, and I do not 

 discover their presence. The absence of these denticles appears to 

 be the only character which distinguishes this group from the genus 

 Seminella of Pease ('American Journal of Conchology,' 1867, 

 vol. iii. pp. 233 & 234). In size and style of sculpture the species of 

 the latter genus answers to the description of Zafra ; and I am in- 

 clined notwithstanding that their lips are toothed within, to include 

 them in that genus. It is possible that Z. mitriformis and Z. sub- 

 vitrea in the very adult state at times may exhibit denticles. 



The latter species diff'ers from the former in being narrow, 

 differently coloured, and having the costse obsolete on all except the 

 last two and a half whorls. Anachis zonata, Gould (l^=Zafra 

 mitriformis), and Anachis virginea of the same author, also should 

 be classed with Zafra. 



Proc. Zool. Soc— 1879, No. XIV. 14 



