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PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. 39. 



protractive, axial ribs, which extend from the summit of the whorls 

 to the suture. Of these ribs, about twenty occur upon each of the 

 whorls. The junctions of these ribs with the strong, spiral cords 



form tubercles, while their junctions with the two 

 slender cords appear as mere deflections of these 

 cords. The tubercles on the posterior of the two 

 strong cords are elongate-oval, having their long 

 axes parallel with the spiral sculpture, while those 

 on the supra-sutural cord are truncated posteri- 

 orly and slope gently anteriorly. Suture strongly 

 impressed, showing the posterior edge of the first 

 basal cord on all the turns. Periphery of the last 

 whorl marked by a rather broad channel, which is 

 crossed by the continuations of the axial ribs. 

 Base short, smooth, excepting the single, spiral 

 cord which bounds the peripheral sulcus. Aper- 

 ture irregular, strongly channeled anteriorly; pos- 

 terior angle obtuse; outer lip thin, rendered wavy 

 at the edge by the external sculpture, which is 

 apparent within the aperture; columella stout, 

 curved and strongly twisted; parietal wall glazed 

 with a thin callus. 



The type (Cat. No. 195213, U.S.N.M.) has eleven 

 post-nuclear whorls and measures: Length 8.3 

 mm., diameter 2.1 mm. It was dredged at the 

 U. S. Bureau of Fisheries station 2808 in 634 fath- 

 oms, on coral sand bottom, bottom temperature 39.9°, near the Gala- 

 pagos Islands. 



Fig. 3.— Eumeta eucos- 

 MIA Bartsch. 



