CLASS GASTROPODA 
259 
Cerithiopsis paramoea Bartsch, 1911 
Plate 72, fig. 4 
Proceedings of the United States National Museum, 40:356; PI. 38, fig. 4. 
Shell moderately large, broadly elongate-conic, brown. (Nuclear whorls 
decollated.) Post-nuclear whorls appressed at the summit, ornamented 
with three nodulose, spiral cords which are about as wide as the spaces 
that separate them. The first of these is at the summit, the third is on the 
anterior fourth between the sutures, while the second is halfway between 
the two. In addition to the spiral cords the whorls are marked by axial 
ribs almost equaling the spiral cords in strength; of these ribs, 16 occur 
upon the first and second, 18 upon the third, 20 upon the fourth, 22 upon 
the fifth, and 32 upon the penultimate turn. The junctions of the axial 
ribs and spiral cords form nodules which on the early whorls are well 
rounded and on the last elongate, their long axes corresponding with the 
axial sculpture. The spaces inclosed between them are well-rounded pits. 
Sutures moderately impressed, showing the posterior edge of the first basal 
cord. Periphery of the last whorl marked by a sulcus almost as wide as 
that separating the supraperipheral from the median cord, and, like it, 
crossed by the continuations of the axial ribs. Base well-rounded, smooth 
except for the feeble cord immediately below the peripheral sulcus. Aper¬ 
ture irregularly oval, decidedly channeled anteriorly; posterior angle 
obtuse; outer lip rendered somewhat sinuous by the external sculpture; 
columella short, curved, with the free edge reflected; parietal wall glazed 
with a thin callus. Length, 6.3; diameter, 2.1 mm. (Bartsch.) 
Type in United States National Museum, No. 1582. Type locality, 
Neah Bay, Washington. 
Range. Known only from type locality. 
Cerithiopsis bakeri Bartsch, 1917 
Plate 67, fig. 10 
Proceedings of the United States National Museum, 52:670; PI. 46, fig. 10. 
Shell of medium size, chestnut brown. Nuclear whorls three and one- 
half, well-rounded, smooth, forming a styliform apex. Post-nuclear whorls 
well-rounded, narrowly tabulatedly shouldered at the summit, and de¬ 
cidedly contracted anterior to the third keel, marked by rather slender axial 
ribs, of which 18 occur upon the first to fourth, 20 upon the fifth, 22 upon 
the sixth, and 24 upon the last turn. Intercostal spaces about one and one- 
half times as wide as the ribs. In addition to the axial sculpture the whorls 
are marked by three strong spiral keels of which the first, which is con¬ 
siderably weaker than the rest, is at the summit. These keels are about as 
wide as the spaces that separate them and are much stronger than the axial 
ribs. The junctions of the axial ribs and the spiral keels form tubercles. 
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