Bartsch — New Marine Mollusks from America. 35 



upon the sixth and seventh, twenty-six upon the eighth and the last whorl. 

 Intercostal spaces about half as wide as the ribs. The spiral sculpture con- 

 sists of three strong cords, of which the first, at the summit, is a little less 

 strong on the early whorls than the other two, but on the last two whorls 

 it equals the other two cords. The intersection of the axial ribs and spiral 

 cords forms strong tubercles rounded on the first cord, slightly truncated 

 posteriorly on the median cord, and strongly rounded anteriorly and strongly 

 truncated on the third cord posteriorly, and gently sloping anteriorly. The 

 spaces enclosed between the axial ribs and spiral cords are well rounded pits. 

 Suture strongly impressed, the extreme appressed portion of the summit 

 appearing as a slender sinuous spiral thread. Periphery of the last whorl 

 marked by a sulcus about half as wide as that separating the median from 

 the third cord. Base short, well rounded, marked by the feeble continua- 

 tions of the axial ribs which extend more or less threadlike over the base, 

 and two strongly impressed spiral lines on the posterior fourth of the base. 

 The space separating the first from the second of these spiral lines is about 

 as wide as that separating the first from the peripheral sulcus. There is 

 no spiral cord at the insertion of the columella. Aperture decidedly chan- 

 neled anteriorly; posterior angle obtuse; outer lip thin, rendered wavy at 

 the edge by the external sculpture which is visible through the substance 

 of the shell; inner lip decidedly sinuous, reflected over and appressed to the 

 columella; parietal wall provided with a thin callus. 



The type, Cat. No. 340,858, U. S. N. M., was collected by Mrs. Oldroyd 

 at Clayoquot, British Columbia. It has nine and a half postnuclear whorls 

 and measures: length, 6.5 mm.; diameter, 2.3 mm. 



I take pleasure in naming this species for Dr. C. M. Fraser, Director of 

 the Biological Station, Nanaimo, British Columbia. 



Cat. No. 340,856, U. S. N. M., was collected by Mrs. Oldroyd. It comes 

 from Victoria, British Columbia, and Cat. No. 340,857, U. S. N. M., two 

 specimens, were likewise collected by Mrs. Oldroyd at Nanaimo, British 

 Columbia. Additional specimens of this species are in Mrs. Oldroyd 's 

 collection. 



Cerithiopsis onealensis, new species. 



Shell elongate conic, pale chestnut brown. Nuclear whorls decollated. 

 Postnuclear whorls moderately rounded, slightly overhanging, crossed by 

 very strong, broad, rounded, slightly protractively slanting axial ribs, of 

 which sixteen occur upon the first four turns, eighteen upon the fifth and 

 twenty-six upon the last. Intercostal spaces about half as wide as the ribs. 

 In addition to the axial ribs the whorls are crossed by three strong spiral 

 cords, of which the one at the summit is a little less strong than the other 

 two. The junction of the axial ribs and spiral cords forms very prominent 

 tubercles. Those on the cord near the summit are well rounded. Those 

 on the median cord are truncated posteriorly, and almost truncated anteri- 

 orly, while those on the cord above the suture are abruptly truncated pos- 

 teriorly and slope moderately, gently anteriorly. On the last whorl, where 

 the ribs are much more crowded, the tubercles have an oblong outline, and 

 are about equal on all three cords, their long axis coinciding with the axis 



