22 



PROCEEDINGS OF THE NATIONAL MUSEUM 



Vol. 70 



The following additional specimens are in the collection of the 

 United States National Museum: 



I There are a hundred more from this station in Doctor Engberg's collection. 

 > There are 23 more from the same locality in Doctor Engberg's collection. 

 ' There are 4 more from the same locality in Doctor Engberg's collection. 

 ' More specimens are in Doctor Engberg's collection. 



CERITHIOPSIS FRASE«I Bartsch 



Plate 5, fig. 8 



Cerithiopois fraseri Babtsch, Proc. Biol. Sot\ Wash., vol. 84, 1921, pp. 

 34-35. 



Shell elongate conic, chestnut brown. Nuclear whorls decollated. 

 Postnuclear whorls almost flattened, marked by moderately strong, 

 rounded, slightly retractively slanting axial ribs, of which 18 occur 

 upon the first, 16 upon the second to fourth, 18 upon the fifth, 20 

 upon the sixth and seventh, 26 upon the eighth and the last whorl. 

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

 ture consists 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 the 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 inclosed 

 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 continuations 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 



