304 PROCEEDINaS OF THE NATIONAL MUSEUM. vol. 41. 



Seven specimens of this species, collected by Mr. Arthur Haycock, 

 at Bermuda, are before us. Two of these may be considered cotypes. 

 One of these, which has lost part of the nucleus, has 12 post-nuclear 

 whorls, and measures: length, 7.6 mm., diameter 2 mm. The other 

 has a complete nucleus and 8 post-nuclear whorls, and measures: 

 length, 5 mm. and diameter 1.5 mm. The remaining five are young 

 individuals. The smaller cotype and two of the young specimens 

 form Catalogue No. 226450 of the United States National Museum 

 collection. 



CERIXmOPSIS CYNXmA, new species. 



Plate 28, fig. 5. 



Shell small, elongate-conic, chestnut brown, excepting the early 

 nuclear whorls, which are white. Nuclear whorls a httle more 

 than 4, well rounded, smooth, forming a mucronated apex. Post- 

 nuclear whorls moderately rounded, marked by 3 strong spiral 

 cords, and strongly retractive axial ribs. Of these, 16 occur upon 

 the first; 18 upon the second to fifth, and 20 upon the sixth and the 

 penultimate turn. The intersections of the spiral cords and the 

 axial ribs form strong tubercles, which are truncated posteriorly 

 and slope gently anteriorly; while the spaces inclosed between them 

 appear as strongly impressed rounded pits. Sutures moderately 

 constricted. Periphery of the last whorl marked by a sulcus as wide 

 as that which separates the supra sutural from the median cord and 

 like this crossed by the continuations of the axial ribs. Base marked 

 with a strong, broad, rounded spiral cord, adjoming the peripheral 

 sulcus, which is rendered feebly tuberculated by the continuations 

 of the axial ribs. Anterior to this cord there is a strong spiral sulcus 

 which equals the subsutural cord in width. Entire surface of spire 

 and base marked by numerous very fine lines of growth, and exceed- 

 ingly fine spiral striations. Aperture irregularly oval, strongly 

 channeled anteriorly, feebly so posteriorly; outer lip tliin, showing 

 the external sculpture witliin, rendered sinuous at the edge by the 

 external sculpture; columella very stout, twisted, and somewhat 

 curved; inner hp reflected over the columella; parietal wall glazed 

 with a thin callus. 



The type and seven specimens (Cat. No. 226449, U.S.N.M.) were 

 collected by Mr. Arthur Haycock in Bermuda. The type, a perfect 

 specimen, has seven and one-half post-jiuclear whorls, and measures; 

 length 3.9 mm. and diameter 1.1 mm. 



CERITHIOPSIS lONTHA, new species. 

 Plate 28, fig. 3. 



Shell very minute, elongate-conic, golden brown, excepting the 

 apex, which is white. Nuclear whorls 2, well rounded, smooth. 

 Post-nuclear whorls well rounded, marked by 3 strong spiral cords, 



