34 Proceedings of the Biological Society of Washington. 



terior angle obtuse; outer lip thin, showing the external sculpture within; 

 inner lip slender, somewhat sinuous, reflected over and appressed to the base 

 for three-fourths of its length ; parietal wall covered by a moderately thick 

 callus. 



The type. Cat. No. 340,844, U. S. N. M., comes from Dogfish Bay, Puget 

 Sound; it has eight whorls remaining and measures: length, 5.5 mm.; diam- 

 eter, 1.7 mm. 



Odostomia (Chrysallida) cumshewaensis, new species. 



Shell broadly elongate conic, milk white, nuclear whorls at least two, 

 obliquely immersed in the first of the postnuclear whorls, above which about 

 two-thirds of the nuclear spire projects. Postnuclear whorls strongly 

 rounded, constricted at the periphery, marked by strong, retractively slant- 

 ing axial ribs, of which sixteen occur upon the first, eighteen upon the second, 

 twenty-two upon the third and the penultimate turn. These ribs are 

 crossed by four strong spiral cords which are a little wider than the ribs, 

 and render the axial ribs tuberculated, the first row of tubercles at the sum- 

 mit being decidedly smaller than the two that succeed it. All three of these 

 have the tubercles strongly, evenly rounded. The fourth immediately 

 above the periphery, however, has the spiral cord stronger than the axial 

 ribs, and appears as an almost uninterrupted cord with feebler tubercles. 

 The pits enclosed between the ribs and spirals cords are strongly impressed 

 and rounded. Suture strongly constricted, a part of the first basal cord 

 showing at the suture of the last two turns. Periphery well rounded, 

 marked by a strong spiral cord. Base moderately long, marked by five 

 spiral cords on the anterior three-fourths, which become succeedingly nar- 

 rower and feebler, the last two being indicated merely by the incised lines 

 that separate them. The anterior fourth of the base is smooth, excepting 

 incremental lines. The spaces between the spiral cords on the base are 

 crossed by fine axial threads. Aperture very broadly oval; posterior 

 angle obtuse; outer lip thin, showing the external sculpture within; inner 

 Up strongly curved, reflected over and appressed to the base, a very narrow 

 chink remaining behind the lip, indicating a very slight umbihcus; parietal 

 wall covered by a thick callus. 



The type. Cat. No. 340,860, U. S. N. M., was collected by Mrs. Oldroyd 

 at Cumshewa Inlet, British Columbia. It has five postnuclear whorls and 

 measures: length, 2.7 mm.; diameter, 1.2 mm. 



This species suggests Odostomia (Chrysallida) astricta Dall and Bartsch 

 from Monterey, but differs from it in being more conic, with the whorls more 

 rounded and having the base shorter and more rounded, as well as in minor 

 details of sculpture. 



Cerithiopsis ffaseri, new species. 



Shell elongate conic, chestnut brown. Nuclear whorls decollated. Post- 

 nuclear whorls almost flattened, marked by moderately strong, rounded, 

 slightly retractively slanting axial ribs, of which eighteen occur upon the 

 first, sixteen upon the second to fourth, eighteen upon the fifth, twenty 



