22 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 9I 



marked by a smooth spiral cord representing the portion appressed 

 to the preceding turn. On the later whorls the sinal sulcus at the sum- 

 mit is crossed by two slender spiral threads anterior to the cord at 

 the summit which divides the space between this cord and the first 

 strong nodulose cord into nearly equal portions. There is also a 

 slender spiral cord between the first and second strong nodulose cords 

 on the antepenultimate turn and two on the last whorl. There are 

 two slender spiral cords between the second nodulose cord and the 

 nodulose cord at the periphery which shows weakly in the suture of 

 the whorls. The axial sculpture consists of strong, broad, rounded, 

 protractively slanting ribs, which are about twice as wide as the spaces 

 that separate them. The junction of these ribs with the stronger 

 spiral cords produces nodules. Suture well impressed. Periphery 

 marked by a nodulose spiral cord, the major portion of which, how- 

 ever, falls immediately below the periphery. Base short, well rounded, 

 marked by two nodulose spiral cords. Columella rather short and 

 stumpy, marked by nine subequal, closely spaced, feebly nodulose 

 spiral cords. Aperture rather short, decidedly channeled anteriorly 

 and posteriorly, the posterior channel falling in the posterior angle 

 of the aperture. There is a strong varix a little behind the edge of the 

 outer lip, and the outer lip between the channel at the summit and 

 its base is protracted into a clawlike element, which, however, does not 

 infringe upon the aperture. The inner lip is reflected as a distinct 

 wall upon the columella and forms a heavy callus on the parietal wall. 

 Type. — U.S.N.M. no. 430562, collected at station 13 in 200 to 

 300 fathoms between latitude i8°3i'o5" N., longitude 66°02'i5" W. 

 and latitude i8°3o'3o" N., longitude 66°04'o5" W. It has 7.5 whorls 

 and measures: Length, 8.7 mm; diameter, 3.1 mm. 



DARBYA, n. gen. 



Type species. — Darhya lira, new species. 



Shell elongate-conic. Nuclear whorls well rounded, smooth. The 

 early postnuclear whorls with a single median row of cusps, the later 

 ones with heavy knoblike axial ribs anterior to the sulcus at the sum- 

 mit, which are crossed by strongly developed, low, well-rounded, 

 weakly nodulose, spiral cords anterior to the sulcus. The entire sur- 

 face is marked by fine lines of growth, which are retractively slanting 

 in the sulcus and protractively slanting on the rest of the turn. Suture 

 strongly appressed. Base well rounded. Columella short, thickened 

 to form a broad fold opposite the varix of the outer lip ; this fold is 

 separated from the parietal wall by a deep concave channel. The 



