304 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 



small, rouuded, surrounded by a thick deposit of polished brown callus which 

 extends nearly to the apex. Lon. of shell, 16.0; of last whorl, 12.0 ; of aperture, 

 8.0; of operculum, 7-5; lat. of shell, 11.0; of operculum, 3.2 mm. 



U. S. S. " Albatross," station 3684, in Mid Pacific, N. Latitude 0° 50', W. 

 Longitude 137° 54', iu 2i63 fathoms, ooze, bottom temperature 35°1\ U. S. N. 

 Mus. 110,750. 



It is extremely unusual to find a dextral shell with a dextrally curved opercu- 

 lum, and it is possible this feature may prove to be an individual abnormality. 



The animal is blind, with a retractile proboscis and no muzzle ; small, rounded, 

 blunt tentacles (in alcohol) ; a small, not twisted or recurved, subcylindric verge 

 with no appendages ; the siphonal fold is also simple ; the foot is short and 

 bluntly pointed behind ; in alcohol, strongly contracted, the surface was coarsely 

 wrinkled and of a whitish color. 



Two Antarctic species dredged by the " Challenger " between Marion Island 

 and the Crozets appear to belong to this subgenus. They are Fusus {Neptunea) 

 calathiscus and F. (N.) seiosus of Watson. In looking over the other 

 reports of deep-sea work I do not find any others which can, with probability, be 

 referred to this group. Watson's supposition that his species might belong to 

 Buccinopsis ( = Liomesus), though having some ground in the conchological 

 features and operculum, is negatived by the fuller information now supplied. 



Buccinidae. 



TRIJNCARIA Adams and Reeve. 



Truncarta Adams and Reeve, Voy. Samarang, Zool. Moll., 1850, p. 33 (type 

 Buccinumjilosum Ads. and live. op. cil. pi. 11, fig. 18) ; H. and A. Adams, 

 Gen. Uec. Moll., 1853, 1, p. HI, (ex parte) ; II. Adams, in Carpenter, P. Z. S., 

 London, 1863, p. 344 ; Tryon, Man. Conch., 1882, 4, p. 8. 



Of the species referred to this genus in the Genera of Recent Mollusca only 

 one, the type, really belongs to it, as was recognized by Ilcnry Adams, according 

 to Carpenter, iu 1863. This came from the Ciiina Sea. I now have the pleasure 

 of adding a second species, and of completing the diagnosis of the hard parts, 

 by the information that the operculum is narrow, clougate-oval, concentric, with 

 the nucleus apical. 



Truncaria brunneocincta Dall. 



I'late 2, fl(;ure 6. 



Cominella brunneocincta Dall, I'roc. U. S. Nat. Mas., 1896, 18, p. 11. 



Shell compact, solid, livid pinkish, with narrow, brown, distant, spiral lines 

 aud a few brown flammulcs near the suture ; nucleus smooth, small, white, of two 



