250 ' EEV. E. BOO a WATSON OlS THE 



smooth, and unequal. Spirals — tliere are none but fine, regular, 

 very faint microscopic scratches ; though a few regular equidistant 

 impressed lines cross the snout. Colour siliceous yellowish- white. 

 S^ire conically cylindrical, the body- whorl being narrow, and the 

 highest whorls rather broad ; the profile-lines are very much in- 

 terrupted by the prominence of the keels and the contraction of 

 the sutures. Apex consists of I5 swoln rounded smooth whorls, 

 of which the extreme tip lies over on one side, but, though some- 

 what compressed, is still a little prominent, and is well defined 

 by the impressed suture. Whorls 8|, of very slow increase, 

 rather high, the last small ; the projection on the longitudinal ribs 

 forms a sharpish keel above the middle of the whorls ; but the 

 whorls themselves are not really cariuated ; the base contracts 

 rather slowly, and runs out into a longish snout. Suture fine, 

 superficial, well marked from the contraction in which it lies. 

 Mouth club-shaped, small ; but it and the pillar are a good deal 

 broken in the only specimen. Outer lip very regularly convex 

 to the canal-edge, where it becomes concave and then straight ; it 

 retreats on leaving the body ; but the sinus is excessively shallow, 

 open, and slight. Inner lip narrow ; it is slightly concave on the 

 body, and then straight on the singularly strong pillar. H. 0"45. 

 B. 0-14. Penultimate whorl, height 0-06. Mouth, height 0-17, 

 breadth 0-1. 



Tor both height and breadth I have had here to make allow- 

 ance, in consequence of the broken condition of the last whorl. 



68. PlETTEOTOMA (DeILLIA) AGLAOPHANES, n. sp. (aykaofavi'is, 



bright.) 



St. 24. March 25, 1873. Lat. 18° 38' 30" N., long. 65° 5' 30" W. 

 Culebra Island, St. Thomas, Danish W. Indies. 390 fms. Coral- 

 mud. 



Shell. — High, narrow, conically cylindrical, with a blunt, flatly 

 rounded apex, a short conical base, and scarcely any snout, hardly 

 angulated, ribbed, contracted in the sinus-area, but barely so at 

 the suture ; grey, with a silvery sheen. Sculpture. Longitudinals 

 — the whorls are crossed from suture to suture by low, sharpish, 

 subangulately projecting, sinistrally convex, hardly oblique ribs, 

 which run continuously, but slightly diminishing in number, up 

 the spire, there being about 15 on the last and 11 on the first 

 regular whorl ; on the base they bend strongly to the left, and 



