26 PROCEEDINGS OF THE NATIONAL MUSEUM Vol.70 



The type, Cat. No. 340827, U.S.N.M., was collected by Mrs. Old- 

 royd in 20 fathoms, off O'Neal Island, Puget Sound. It has almost 

 seven postnuclear whorls and measures, length, 5.1 mm.; diameter 

 1.9 mm. 



We have seen the following additional specimens : Cat. No. 362165, 

 U.S.N.M., six specimens, from Shuyak, Strait, Afognak Island, 

 Alaska, collected by Walter Eyerdam; Cat. No. 342739, U.S.N.M., 

 six specimens, collected by Dr. Carl C. Engberg at Olga, Washington. 

 Nine additional specimens from the same locality are in Doctor 

 Engberg's collection. Cat. No. 346649, U.S.N.M., contains three 

 specimens collected by G. Willett at Craig, Alaska. 



CERITHIOPSIS (CERITHIOPSIDELLA) FIA, new species 



Plate 5, figs. 6, 7 



Shell broadly conic, chestnut-brown. Nuclear whorls decollated 

 excepting a portion of the last turn which has numerous slender 

 distantly spaced, retractively slanting axial threads and numerous 

 fine spiral threads in the intercostal spaces which are placed at right 

 angles to the axial ribs. Postnuclear whorls moderately rounded, 

 marked by almost vertical axial ribs of which 14 occur upon the 

 first and second, 16 upon the third and fourth, 18 upon the fifth 

 and sixth, 20 upon the seventh, and 22 upon the last turn. These 

 ribs are about as wide as the spaces that separate them. In addition 

 to the axial sculpture, the whorls are marked by three strong spiral 

 cords of which the first at the summit is a little weaker than the rest. 

 These cords render their junction with the axial ribs strongly nodu- 

 lose. The nodules of the cord at the summit are rounded; those of 

 the other two cords are truncated posteriorly and slope gently an- 

 teriorly. The pits inclosed between the axial ribs and spiral cords 

 are almost rounded. Periphery marked by a strong spiral cord 

 which is separated from the first supraperipheral cord by a groove 

 about as wide as that separating that cord from the median of the 

 spire. The groove is crossed by the continuations of the axial ribs 

 which extend feebly over the cord and render it weakly tuberculate. 

 Base short, well rounded, marked by four strong spiral cords which 

 grow successively weaker from the posterior anteriorly. These are 

 separated by grooves much narrower than the width of the cords, 

 and they are rendered slightly tuberculated by the slender continua- 

 tion of the axial ribs. Aperture subquadrate, decidedly channeled 

 anteriorly; posterior angle obtuse; outer lip thin, showing the 

 external sculpture within, rendered sinuous at the edge by the 

 external sculpture; inner lip sigmoid. 



The type. Cat. No. 340935 U.S.N.M., was collected by Mrs. T. S. 

 Oldroyd at Monterey Bay, California. It has nine whorls, and 



