1879.] MR. E. A. SMITH ON MOLLUSCA FROM JAPAN. 193 



covered with a callosity, tuberculated above at the suture ; canal 

 very short and a little recurved. 



Length 10 millims., diam. 31. 



Hab. Station 26. 



This species is remarkable for the abrupt and acute termination of 

 costae above. 



25. Drillia intermaculata. (Plate XIX. fig. 19.) 



Shell shortly fusiform, shining, subpellucid, white, with two trans- 

 verse series of brownish-yellow dots between the ribs on the upper 

 whorls and four on the last. Whorls 7, two nuclear ones simple, 

 smooth, convex, the others concave at the upper part and convexish 

 beneath, ornamented with oblique rounded costae, which become 

 obsolete above, not attaining to the suture, twelve in number on a 

 whorl ; those on the body-whorl less strongly developed, especially 

 near the labrum, and not extending downwards below the middle. 

 Aperture occupying about tveo fifths of the entire length ; sinus deep, 

 lower sinuation slight ; columella arcuate, with a tubercle at the 

 suture ; canal very short, wide, and not recurved. 



Length 10^ millims., diam. 3|. 



Hab. Station 31. 



The painting of this pretty shell is very characteristic ; the upper- 

 most series of dots is situated between the ribs just about where they 

 become obsolete, the second row at the middle of the body-whorl, 

 and the two following at equal distances below. 



26. Drillia humilis. (Plate XIX. fig. 20.) 



Shell fusiformly ovate, chocolate-brown at the base of the whorls 

 and lighter above, indistinctly banded with white round their middle, 

 the band being most conspicuous on the ribs, which are also white at 

 their upper extremities. Whorls 8 ; two apical smooth, convex, rather 

 large, the rest considerably excavated above and rather bulgingly con- 

 vex inferiorly and obliquely ribbed ; costae nine in number on the pen- 

 ultimate whorl, subobsolete in the concavity at the upper part of the 

 whorl, and again nodulous at the suture ; last whorl with a trans- 

 Terse series of white dots on the costee a little below the middle ; ribs 

 gradually attenuating downwards, not extending quite to the extreme 

 base ; the latter, or cauda, is sculptured with about six oblique fine 

 grooves. Aperture small, brown, white at the sinus and at the 

 termination of the series of dots a little below the middle ; sinus 

 large, deep, rounded, in the concavity, lower sinuation slight ; lip 

 thin, arcuate, produced, with a large tumid varix at a little distance 

 from the margin ; columella a trifle oblique, coated with a smooth 

 brown callus, adjoining the suture in the form of a tubercle ; canal 

 very short, broad, and not recurved. 



Length 9 millims., diam. 3;^. 



Hab. Station 5. 



This species at a first glance has the appearance of a dwarfed D. 

 obliquata (Reeve), but when closely'examined proves specifically dis- 

 tinct. It has fewer volutions, whereof the apical ones are propor- 



Proc. Zool. Soc— 1879, No. XIII. 13 



