506 



GASTROPODA. 



[Pectinibraiichia. 



KEY TO SPECIES. 



A. Shell acicular or subulate. 



a. Fine spiral threads on the last whorl only ; shell acicular. . acicula. 

 act. Fine dense spiral lines on all the post-nuclear whorls ; 



shell subulate . . . . . . . . . . tenuistriata. 



B. Shell more or less fusiform. 



a. Whorls distinctly shouldered. 



b. Height of spire almost equalling that of the aperture. 

 c. Surface with axial sculpture. 



d. About 12 axial riblets and 2-3 keels on the 

 spire-whorls ; protoconch microscopic- 

 ally reticulated . . . . . . aculeata. 



dd. Surface cancellated by axial and spiral 



riblets ; protoconch smooth . . . . cancellata. 



cc. Surface without axial sculpture. Spire-whorls 



with 4 sharp spiral threads . . . . conquisita. 



bb. Height of spire If that of the aperture. No axial 

 sculpture ; spire-whorls with 4 strong spiral 

 cords . . . . . . . . . . crassilirata. 



aa. Whorls not distinctly shouldered. 



b. Spire but little higher than the aperture. 

 c. Spiral lines very fine. 



d. A few spiral lira? on the base ; height 



3-5 mm. . . . . . . . . amphipsila. 



dd. Microscopic fine spiral lines on all post- 

 nuclear whorls, body-whorl with about 

 20 spiral lira?, more distinct on base ; 

 height 6 mm. . . . . . . psila. 



cc. Sharp spiral lira?, 5 on the penultimate whorl . . chariessa. 

 bb. Height of spire 1^ times that of the aperture. Spire- 

 whorls with 3 fine spiral lira?, 10-12 on the body- 

 whorl . . . . . . . . . . totolirata. 



1. Daphnella acicula, Suter, 1908. Plate 22, fig. 9. 



Daphnella acicula, Suter, P. Mai. S., viii, 1908, 189, pi. 7, f. 24. 



Shell minute, acicular, the last whorl very high and spirally striate. 

 Sculpture consisting of equal fine spiral threads with linear grooves 

 between them, on the last whorl only, and more distinct on the base. 

 Colour flavescent, the protoconch purple. Spire subcylindrical, slightly 

 higher than the aperture, the outlines faintly convex. Protoconch 

 comparatively large, papillate, of 1^ smooth whorls, the nucleus 

 oblique, broadly rounded. Whorls 4, the last two very rapidly increas- 

 ing, faintly convex, very little attenuated towards the base. Suture 

 linear. Aperture high, triangular, narrowly angled above, with a 

 broad rudimentary canal below. Outer lip sharp, slightly thickened, 

 somewhat convex, with a broad shallow sinus at the suture, thence 

 advancing in a broad curve towards the base, smooth inside. Colu- 

 mella oblique, forming a straight line up and over the parietal wall. 

 Inner lip very thin, inconspicuous. 



Diameter, 1-3 mm. ; height, 3-6 mm. 



Animal unknown. 



Type in my collection. 



Hab. Near the Snares, in 50 fathoms (Captain Bollons). 



