NO. 2 NEW TURRITID MOLLUSKS BARTSCH 27 



SYNTOMODRILLIA WOODRINGI, n. sp. 



Plate 8, figs. 5, 7, 9 



1889. Drillia lissotropis Dall, Bull. Mus. Comp. Zool. pp. 91-92, in part. Not 



Drillia lissotropis Dall, 188 1, ibid., pp. 58-59. 

 X928. Drillia lissotropis, Woodring, Miocene mollusks from Bowden, Jamaica, 



pt. 2, pp. 160-161. 



Shell small, fusifoni], yellowish white, shining. Nuclear whorls 

 2.5, smooth, well rounded ; the early postnuclear whorls inarked by 

 almost nodulose axial ribs, which are largest posterior to the periphery 

 and give to these whorls a somewhat crenulated aspect. These ribs 

 gradually grow longer on the succeeding turns, and on the last turn 

 they extend over the base to the columella. They are strongest on 

 the middle of the shell and become less strong anteriorly. There are 

 10 on the first and second postnuclear whorls, 12 on the third to 

 sixth, and 16 upon the last. On the last whorl there is a decided 

 hump a little behind the aperture. The spaces separating the axial 

 ribs are about as wide as the ribs, or a little wider. They are crossed 

 on the spire by slender, spiral threads, which are confined to the 

 anterior two thirds of the turns between the summit and the suture. 

 Of these, six occur upon the fourth, seven upon the fifth and last 

 whorl between the summit and the periphery, and eight between the 

 periphery and the insertion of the columella on the well-rounded 

 base. The columella is of moderate length crossed by nine almost 

 equal spiral threads, which are much stronger than those on the base. 

 Aperture moderately long and rather broad, decidedly channeled at 

 the posterior angle of the aperture and also anteriorly; outer lip thin, 

 decidedly channeled at the posterior angle, and protracted between 

 the channel and its anterior limitation ; inner lip reflected over and 

 appressed to the columella as a thick callus that extends up over the 

 parietal wall, where it forms a lump near the posterior angle of the 

 aperture. 



Type. — U.S.N.M. no. 87477c, dredged by the Blake at station 

 273 in 103 fathoms off Barbados. It has 8.7 whorls and measures: 

 Length, 18.2 mm; diameter, 3.1 mm. 



SYNTOMODRILLIA CAROLINAE, n. sp. 



Plate 8, figs. I, 4, 8 



Shell small, elongate-conic, horn-colored with a pinkish flush. Nu- 

 clear whorls a little more than 2, forming a conspicuous slender apex, 

 whose whorls are well rounded and smooth. Postnuclear whorls 



