1879.] MR. E. A. SMITH ON MOLLUSCA FROM JAPAN. 195 



29. Drillia subauriformis. (Plate XIX. fig. 23.) 



Shell elongate, narrow, yellowish white, banded at the suture with 

 purplish brown, and the lower half of the body-whorl of the same 

 colour. Whorls 10; the two or three apical ones smooth, convex; 

 the rest convex, sometimes exhibiting a shght angulation at a little 

 distance from the top, obliquely costate and spirally Urate ; costa3 

 about fourteen on a whorl, rounded, varying somewhat in thickness 

 in dfferent specimens ; lirse also subject to variation in number and 

 stoutness, usually five or six in number, but sometimes as many as 

 eight ; on crossing the costas they are a little thickened, producing 

 a somewhat granulous effect ; on the last whorl there are from 

 eighteen to twenty lirse, whereof those around the base are smooth 

 and simple, as they do not cross the riblets, which terminate a little 

 below the middle of the whorl. Aperture varying in length in pro- 

 portion to that of the entire shell, sometimes occupying a little more 

 and in other specimens a trifle less than one third of it ; labrum stained 

 with brown, thickened exteriorly, denticulated or Urate within, and 

 widely sinuated just below the suture; columella transversely Urate 

 (this character is only apparent in quite adult shells, and then not 

 obviously) ; canal short, narrow. 



Length 9^ miUims., diam. 2|. Larger specimens are 12^ long 

 and 3J broad. 



Jlah. Station 21. 



This species has for its nearest ally Befrancia tecta, Dunker. 

 It is, however, more elongate, and apparently, judging from Bunker's 

 description and figure, differently coloured. The small and larger 

 forms of this species agree in all respects with the exception of size. 



30. Drillia tkxta, Dunker. 



Befrancia texta, Dunker, Malakozool. Blat. 1859, vol. vi. p. 225 ; 

 Moll. Japonica, p. 2, pi. i. fig. 19. 



Hab. Station 22. 



Little can be added to the excellent diagnosis of this species given 

 by Dunker. The number of whorls in the specimen which I con- 

 sider belongs to this species, from the above locality, is eight. The 

 two nuclear are glassy, smooth, and convex; the rest are convex, 

 with a slight tendency to angulation or shouldering at the upper 

 part. Besides the colouring noticed by Dunker, the whorls are 

 stained beneath the suture with light brown, in which respect it 

 agrees with the preceding species (subaiu-iformis), and in fact might 

 almost be considered an extreme variety of it. 



31. Drillia gracilenta, var.. Reeve. (Plate XIX. fig. 24.) 



Pleurotoma (jracilenta, Reeve, Conch. Icon. sp. 1 14. 



Var. =P. contracta, Reeve, I. c. sp. 116. 



Var. =P./usoides, Reeve, Lc. fig. 349. 



Shell narrow, subfusiform, elongate, whitish, banded at the siriure 

 and around the middle and base of the last whorl with orange-red. 

 "Whorls 7, the first two smooth, very convex, shining; the rest 



13* 



