TURRIDAE 189 



Genus GLTPHOTURRIS Woodring, 1928 

 Glyphoturris rn^irimasso (Dall) PI. 39, fig. 273 



Alt., 8; spire, 4.5 mm. Shell small, turreted; white with brown- 

 ish markmgs m revolvmg lines and about sutures; eight whorls; 

 nucleus and postnuclear whorl smooth, next whorl rounded with 

 narrow, sharp riblets and fine spiral threads. Succeeding whorls with 

 strong, rounded axial ribs, sharply keeled at shoulder of whorls; 

 eight ribs on body whorl extending to base of shell. Strong spiral 

 cords and fine threads overlay axial ribs and extremely fine and 

 closely placed grooves cross the revolving sculpture producing a fine 

 granulation of the entire surface. The extreme delicacy of this sculp- 

 ture is apparent only in living specimens. Aperture widest at middle, 

 anterior canal short, well open, widest at base; outer lip with thick 

 posterior varix, a low internal varix within; sinus broad, rounded; 

 columella with one obscure oblique fold; no operculum. 



Dredged in two to six fathoms. Occasionally found living on 

 sandy bottoms of shallow bays. 



Genus EUBELLAT03IA Bartsch and Rehder, 1939 



Rnbellatoma dioniedeassi Bartsch and Rehder PI. 39, fig. 274 



Alt., 9.7; max. diam., 4.0 mm. 



Shell elongate-turreted. Nuclear whorls bright chestnut-brown, the 

 rest of the whorls with a broad brown band covering the posterior half 

 of the whorls. There is a second broad band a little less wide immediately 

 anterior to the periphery followed by a pale zone of almost equal width, 

 while the tip is chestnut-brown. The interior of the aperture shows the 

 exterior coloration. The first 1.5 nuclear whorls are smooth, the suc- 

 ceeding half turn is marked by slender, retractively curved, axial riblets 

 followed by the postnuclear sculpture. Postnuclear whorls appressed at 

 the summit, with a decided angle, the crest of which occupies the anterior 

 fourth between the summit and suture. The whorls are marked by strong 

 sinuous axial ribs, which attain their highest elevation at the angulation 

 and taper gently toward the summit and columella where they evanesce. 

 Of these ribs, 12 occur on the first postnuclear turn, 9 on the second, third 

 and fourth, 10 on the fifth, and 7 on the last seven-tenths of a turn. The 

 axial ribs are not quite so wide as the spaces that separate them. The 

 entire surface of the shell is marked by numerous incremental lines and 

 equally strong spiral striations, the combination of which gives to the 

 surface a feebly fenestrated pattern. Base rather long, marked by the 

 same sculpture as that which characterizes the spire. Columella short, 



^^° Gr., glypkein, to carve; Lat., turris, tower; ruga, a wrinkle; rima, 



cleft, fissure. 

 351 Lat., rubcllus, reddish; diomedia, genus of bird albatross, collected by 



U.S. Bureau of Fisheries Steamer "Albatross", 



