NO. 1861. NEW MARINE M0LLUSK8 FROM BERMUDA— BARTSCH. 305 



and slightly retractive axial ribs, of the latter 18 occur upon the 

 first; 20 upon the second and tliird, and 24 upon the fourth and 

 penultunate turn. The intersections of the axial ribs and spiral 

 cords form strong tubercles, of which those on the cord at the sum- 

 mit and those on the median cord are truncated both anteriorly and 

 posteriorly, while those on the supra-sutural cord are truncated 

 posteriorly, sloping gently anteriorly. The spaces inclosed between 

 the axial ribs and spiral cords are strongly impressed squarish pits. 

 Sutures strongly constricted. Periphery of the last whorl marked 

 by a sulcus as wide as that which separates the supra sutural from 

 the median cord. The sulcus is crossed by the feeble contmuations 

 of the axial ribs. Base moderately rounded, marked by a broad, 

 low spiral cord, which limits the peripheral sulcus posteriorly, and 

 a second tumid low spiral cord at the insertion of the columella. 

 Entire surface of spire and base marked by numerous fine Imes of 

 growth, and exceedingly fine spiral striations. Aperture irregu- 

 larly oval, strongly channeled anteriorly, feebly posteriorly; outer 

 lip thin, somewhat patulous, rendered wavy by the external sculp- 

 ture; columella stout and somewhat curved; inner hp reflected over 

 the columella; parietal wall covered with a thick callus. 



Three specimens of tliis species were collected by Mr. Arthur 

 Haycock in Bermuda. These may be considered cotypes. The 

 specimen figured has a little more than five post-nuclear whorls, and 

 measures: 2.1 mm. in length and 0.9 mm. in diameter. One of the 

 three is Cat. No. 226451, U.S.N.M. The other two are in the Ber- 

 muda Museum. 



TRIPHORIS BERMUDENSIS, new species. 

 Plate 28, figs. 2 and 4. 



Shell elongate-conic, marked by alternate spiral bands of white 

 and brown. Nuclear whorls moderately rounded, forming a conic 

 apex, the first turn smooth, the second marked by a raised spiral 

 thread which is a little nearer the suture than the summit. On the 

 third whorl a second spiral thread is present, between the first and 

 the summit, being a little nearer to the neighboring thread than the 

 summit. In addition to these spiral threads the last two nuclear 

 whorls are marked by 28 slender, very regular, threadlike axial ribs, 

 which equal the spiral threads in strength. Post-nuclear whorls mod- 

 erately rounded, the early ones marked with two strong tuberculated 

 spiral cords, one of which is at the summit, and the other a little 

 posterior to the suture. On the later turns a third slender tubercu- 

 lated spiral cord makes its appearance between the other two, being 

 a little nearer to the cord at the summit than to the supra-sutural 

 cord. In addition to the spiral sculpture the post-nuclear whorls are 

 marked by strong axial ribs, of which 16 occur upon the first; 18 

 upon the second to fifth; 20 upon the sixth to eighth; and 22 upon 



