482 KEY. E. BOOG WATSON ON THE 



which, obsolete in the sinus-area, are feeble on the body, but 

 sharper and more distinct on the base and snout. There is a very 

 faint angulation below the sinus-area. Colour : the shell is thin, 

 semitransparent white, with hardly any gloss. Spire conical, sub- 

 scalar from the slight short tumidity below the suture. Apex 

 consists of 4 embryonic whorls, which are buff, darkening to orange 

 at the tip ; they are a little broadly conical, rounded, with a slight 

 angulation, and parted by a distinct suture ; they rise to a very 

 minute, spirally scratched, round, and very slightly prominent 

 knob ; they are sculptured with raised bars, which are straight 

 and simple above, but oblique and crossed below. Whorls 7 J in 

 all ; they are slightly concave and shouldered in the sinus-area, 

 which is bordered by a faint angulation, below which they are 

 slightly tumid, without any contraction into the inferior suture ; 

 the last, which is rather small, has a conical base produced into a 

 broadisb, triangular, one-sided snout. Suture slight, inasmuch as 

 the inferior whorl laps up on the one above ; but there is an appre- 

 ciable constriction. Mouth oblong, pointed above ; there is no 

 canal below except the channel behind the pillar. Outer lip very 

 thin; its curve is somewhat flattened; its edge forms a very regular 

 sweep with a rather high shoulder above, between which and the 

 body lies the deepish, but broad, open-mouthed sinus. Inner lip 

 very thin and narrow, dying out early on the scarcely oblique or 

 twisted edge of the longish, straight, and conical pillar, the point- 

 of which comes short of the lip-edge, and whose junction with the 

 body is concave. H. 021. B. OT. Penultimate whorl, height 

 0-04. Mouth, height Ol, breadth 0"05. 



This species somewhat resembles P. (D.) pachia, "Wats. ; but is 

 in all its proportions very much smaller ; the whorls, especially 

 the last, are very much less tumid, the spire is distinctly scalar, 

 and the sculpture is very markedly different. Than Daphnella 

 attenuata, E. Sm., besides the different apex, the whole shell is 

 smaller, more attenuated, and more delicate. 



55. Pletjeotoma (Deeeancia) aeaneosa, n. sp. 



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

 North of Culebra Island, St. Thomas, Danish "West Indies. 

 390 fms. Coral-mud. 



Shell. — Small, yellowish, minutely ribbed and faintly spiralled, 

 with a small, broadish, scalar, sharp-pointed spire, a slightly swoln 



