NO. 2 NEW TURRITID MOLLUSKS BARTSCH 5 



which II are present on the last whorl. Anterior to the depressed area 

 the threads are replaced by pitted impressed lines, which also cover 

 the base. Between the threads and lines, under high magnification, 

 still finer, closely spaced, microscopic spiral striations are present, and 

 and the ribs and the intercostal spaces also bear fine incremental lines 

 with microscopic axial incised lines between them. The heavier incre- 

 mental lines terminating anteriorly in the spiral line of pits divide the 

 space between the spiral lines into scalelike elements suggesting the 

 scales of some butterfly wings, each scale being bordered by a deeper 

 axial depression and marked by microscopic axial striations, as well as 

 the microscopic spiral lines, the axial striations being a little stronger. 

 The columella has a moderately strong basal fasciole, which is bor- 

 dered posteriorly by three feeble spiral threads and crossed by two 

 more, whereas anterior to the basal fasciole the columella bears about 

 six feebly impressed spiral threads. The aperture is moderately large, 

 rather broad, slightly channeled anteriorly with the posterior channel 

 deeply incised and its wall reflected as a strong callus over the parietal 

 wall. The stromboid notch at the anterior end of the outer lip is 

 rather short and shallow ; the space between the stromboid notch and 

 the basal channel is clawlike. The parietal wall is covered by a 

 moderately thick callus. There is a stronger varix about a quarter of 

 a turn behind the aperture on the last whorl. 



Type. — U.S.N.M. no 430249, obtained at station 26 in 33 to 40 

 fathoms on rough coral rock bottom between latitude i8°3o'2o" N., 

 longitude 66°22'o5" W. and latitude i8°3o'30" N., longitude 66°23' 

 05" W. It has 12 whorls and measures : Length, 37.8 mm ; greater 

 diameter, 14.3 mm. 



DOUGLASSIA, n. gen. 



Type species. — Douglassia enae, new species. 



Shell of medium size. Nuclear whorls well rounded, smooth ; post- 

 nuclear whorls with a broad concave area immediately below the sum- 

 mit, across which the axial ribs do not extend ; the rest convex. Base 

 rather short. Columella short with a feeble fasciole. Aperture rather 

 large, deeply channeled anteriorly and posteriorly, the posterior chan- 

 nel being immediately below the summit ; stromboid notch conspicu- 

 ously reflected; columellar wall reflected as a heavy callus; parietal 

 wall with a heavy callus that forms a knob at the ix)sterior angle. The 

 sculpture consists of strong axial ribs that extend from the anterior 

 limit of the concave area, where they are strongest over the base, grow- 

 ing feebler anteriorly. Fine incremental lines are also present on the 



