8 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 9I 



CARINODRILLIA (BUCHEMA) LIELLA, n. sp. 



Plate 2, fig. 4, 8, 9; plate 3, fig. 5 



Shell of moderate size, elongate-conic, yellowish white. Nuclear 

 whorls 2.3, the first 2 well rounded, smooth, the last .3 marked by 

 slender equally spaced axial riblets which are slightly retractively 

 slanting at the summit. Postnuclear whorls rounded, marked by 

 heavy, humplike axial ribs which evanesce in the posterior sinal region 

 and attain their greatest development on the anterior two-thirds of the 

 whorls. Of these ribs, which are as broad as the spaces that separate 

 them, eight occur upon the first, nine upon the second to fourth, eight 

 upon the fifth, and nine upon the remaining. In addition the shell is 

 marked by fine incremental lines which are retractively slanting in 

 the posterior sinal region. The spiral sculpture on the first postnuclear 

 whorl is too worn to describe, but from the second to the last whorl 

 the heavy axial ribs are crossed by three strong spiral cords. These 

 are equal in strength and are separated by spaces almost twice as wide 

 as the cords. There is a strong cord a little anterior to^ the appressed 

 summit of the whorls which is equal in strength to those on the ribs. 

 In addition to the strong spiral sculpture the posterior sinal region and 

 the spaces between the cords anterior to the sinus are marked by fine 

 spiral lirations. Of these, three are present on the sixth whorl between 

 the first and second cords, and two between the second and third. 

 On the seventh whorl there are four lirations between the three cords 

 anterior to the sinus and between the third cord and the suture. Six 

 are present on the eighth whorl between the three cords and between 

 the third cord and the suture. The combination of the incremental 

 lines and the spiral lirations produces a fine clothlike pattern. Pe- 

 riphery of the last whorl rounded. Base well rounded, short, marked 

 by the continuation of the axial ribs, and three spiral cords which are 

 equal in strength to those on the spire. The space between the first 

 cord posterior to the suture and the first basal cord is marked by four 

 spiral lirations. There are five lirations between the first and second 

 cords, and four between the second and third. Columella stout, mod- 

 erately short, with an umbilical chink at its tip. It is marked by the 

 feeble continuation of the axial ribs, and seven spiral cords equal to 

 those on the base. The spaces between these cords are likewise crossed 

 by feeble spiral lirations. Aperture moderately short, deeply channeled 

 anteriorly and posteriorly, the posterior sinus falling a little anterior 

 to the summit. The outer lip is protracted into a clawlike element 

 between the anterior limit of the posterior sinus and the stromboid 



