1879.] MR. E. A. SMITH ON MOLLUSCA FROM JAPAN. Wl 



arcuate in outline in the middle ; columella straightish, but a trifle 

 oblique, covered with a thin callosity terminating in a tubercle at its 

 junction with the upper extremity of the labrum ; canal short, re- 

 curved. 



Length 161 millims., diam. 4^. 



Hab. Station 13. 



This slender species is well characterized by the brown bands, 

 which are interrupted by the oblique ribs. The spiral striation is 

 rather coarse. 



2i). Drilla JAPONicA, Lischke. (Plate XIX. fig. 1.5.) 



Drilla japonica, Lischke, Japanische Meeres-Conch. i. p. 32. 



JIab. Station 27. Nagasaki {Lischke). 



The number of whorls is rather underestimated by Lischke, whose 

 two specimens were mutilated at the apex, and had but six remaining 

 volutions. The two examples in the present collection have eleven 

 each, whereof the two nuclear ones are brown, smooth, and shining ; 

 the rest are a little constricted at the upper part, and then rather 

 convex. Both of these shells and also a third in the Cumingian Col- 

 lection display two or three transverse series of more or less distinct 

 whitish granules ; a little below the middle of the last whorl they form 

 an ill-defined band terminating in the white spot near the base of 

 the labrum, which at this point has a second shallow sinus. 



21. Drillia oiiLiauATA, Reevc. var. 

 Pleurotoma obliquafa, Rve. Conch. Icon. i. fig. 262. 



Hub. Station 21. — ? (Beeve) ; Gey\m\ and Singapore (Mus. 

 'Cuminff) ; var. from Persian Gulf (Colonel Pelh/). 



The single shell of this species is not full-grown, and differs from 

 the normal form in having a series of white dots on the ribs, in place 

 of the band round the middle of the whorls. In describing this 

 species. Reeve omitted to notice the presence of a transverse row of 

 minute white dots situated on the costse a little below the middle of 

 the body-whorl, the end or cauda of which is encircled by about five 

 oblique lirse ; columella smooth, very slightly oblique, covered with 

 a callosity terminating in a large tubercle at the upper end of the 

 labrum, and aiding in forming the large rounded sinus ; labrum thin 

 at tlie edge, with a large swollen varix some distance behind, and 

 with a second slight emargination near the base. 



22. Drillia suBOBLiauATA. (Plate XIX. fig. IG.) 



Shell acuminately ovate, light brown, with a narrow white zone a 

 little below the middle of the whorls, and a second, less distinct and 

 snbinterrupted one a little below the middle of the body-whorl : 

 whorls 9, two nuclear smooth, convex, white, the rest concave at 

 top, thin, convex at the sides, obliquely costated and finely transversely 

 lirated; costae rather fine, 14 on the penultimate whorl, subnodose 

 a little above the middle, where the concavity of the whorl commences, 

 attenuated at the upper extremity, and becoming obsolete about the 

 middle of the body-whorl ; the spiral liraj are not conspicuous, rather 



