NO. 1799. WEST AMERICAN EUMETA8—BART8CH. 567 



cords and the axial ribs are elongated pits, having their long axes 

 parallel with the spiral sculpture. Suture strongly constricted. 

 Periphery of the last whorl marked by a sulcus about half as wide as 

 that wliich separates the two spiral cords on the spire, and, like these, 

 crossed by the continuations of the axial ribs, which terminate at the 

 posterior border of the basal cord. Base very short, concave between 

 the columella and the periphery, marked by strong hnes of growth 

 and two slender, spiral cords wliich are near the periphery. Aperture 

 subquadrate, very strongly channeled anteriorly; posterior angle 

 obtuse; outer lip rendered decidedly sinuous by the external sculp- 

 ture; columella very stout, light brown, curved and twisted, provided 

 with a moderately strong fold at its anterior border; parietal wall 

 glazed with a thin callus. 



The specimen described (Cat. No. 195212, U.S.N.M.) was dredged at 

 U. S. Bureau of Fisheries station 2799 in 29.5 fathoms, in the Bay of 

 Panama. It has 8 post-nuclear whorls and measures: Length, 4.3 mm., 

 diameter, 1.3 mm. Another specimen (Cat. No. 96409, U.S.N.M.) 

 was dredged at U. S. Bureau of Fisheries station 2823 in 26 fathoms, 

 on sandy bottom, off La Paz, in the Gulf of CaHfornia. Prof. C. B. 

 Adams's type came from Panama. 



EUMETA EUCOSMIA, new species. 



Shell elongate-conic, white. Nuclear whorls two and one-half, 

 large, projecting beyond the outline of the first post-nuclear turn. 

 The first half nuclear turn is smooth, the next turn is marked by 

 sixteen strong, somewhat retractive, axial ribs, while the last turn has 

 twenty axial ribs which are almost vertical and about twice as wide 

 as the intercostal spaces. The middle of the intercostal spaces on the 

 latter half of this whorl, also the ribs, are crossed by a broad, incised, 

 spiral line which separates this whorl into an upper and lower half. 

 This incised line develops into a broad sulcus, that separates the 

 posterior from the anterior row of tubercles on the post-nuclear turns. 

 The first one and one-half nuclear whorls are well rounded, the last 

 inflated, separated by a well-impressed suture. Post-nuclear whorls 

 somewhat flattened, the early ones marked by two nodulose, sphal 

 cords, the first of which is at som,e little distance anterior to the 

 summit, while the second is at even a greater distance posterior to the 

 suture. Beginning with the fourth post-nuclear turn, the summit 

 of the whorls develops into a slender, spiral cord which grows stronger 

 on the succeeding turns. Beginning with the sixth post-nuclear 

 whorl, a slender, spiral cord makes its appearance halfway between 

 the two strong spiral cords; this also increases steadily in size, but 

 at no time attains the strength of the stronger cords. In addition 

 to the spiral sculpture, the whorls are marked by broad, low, slightly 



