NO. 2 NEW TURRITID MOLLUSKS BARTSCH I7 



passing over the axial ribs render these nodulose, the long axes of the 

 nodules coinciding with the spiral sculpture. Of these spiral cords, two 

 occur on the third and fourth, four on the fifth, five on the sixth, and 

 six on the last whorl between the summit and the periphery. In addition 

 to this there are fine spiral threads on the channel, at the summit of 

 which three occur on the fifth, four on the sixth, and five on the 

 last whorl. On this there are also some finer spiral threads between 

 some of the spiral cords. Suture well constricted. Periphery well 

 rounded. Base moderately long, marked by the continuation of axial 

 ribs and six spiral cords. Columella moderately long, marked in the 

 posterior half by the feeble continuation of the axial ribs and ii spiral 

 threads, which grow consecutively weaker from the posterior anteri- 

 orly. In addition to this the entire surface of the shell is marked 

 by fine lines of growth and densely placed granulations. Aperture 

 moderately long, decidedly channeled both anteriorly and posteriorly. 

 Outer lip reinforced by a strong callus a little behind the edge, the edge 

 being produced into a clawlike element. The inside of the callus within 

 the aperture bears seven strong denticles. Inner lip also denticulated, 

 the denticles not so strongly developed as on the outer lip. The anterior 

 portion of the inner lip is abraded so that the actual count of the 

 denticles cannot be made. Parietal wall covered by a callus that is 

 developed into a strong denticle opposite the posterior termination 

 of the callus of the outer lip, which renders the posterior sinus almost 

 tubular. 



Type. — The unique type, U.S.N.M. no. 430354, was collected at 

 .station 102 in 90 to 500 fathoms between latitude i8°5o'3o" N., 

 longitude 64°43' W. and latitude i8°5i' N., longitude 64°33' W. It 

 has eight whorls remaining and measures : Length, 16 mm ; diameter, 

 6.5 mm. 



GLYPHOSTOMA (GLYPHOSTOMOPS), n. subgen. 



Type species. — Glyphostoma {Glyphostomops) hendcrsoni, new 

 species. 



Shell similar to Glyphostoma but lacking the denticulations on the 

 columella and within the aperture on the varicial callus, 



GLYPHOSTOMA (GLYPHOSTOMOPS) HENDERSONI, n. sp. 



Plate 5, figs. 2, 5, 8 



Shell moderately large, elongate-conic, milk-white. Nuclear whorls 

 2.5, the last one with a moderately strong angulation one third of the 

 distance between the summit and the periphery, posterior to the 



