94 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



Type : — No. 228, and cot5^pe No. 229, Cal. Acad. Sci., lower 

 Miocene of Kern River, California, locality 64, in the bottom 

 of a small canyon about Wi miles due north of Barker's ranch 

 house. 



Drillia Columbiana, new species 

 Plate 7, figures 4a and 4b. 



Shell fusiform, small, with six or seven whorls ; spire high, 

 with an acute apex ; whorls angulated a little below the middle, 

 concave above with very fine spiral striations, flat below with 

 two or three spiral threads, crossed by axial lines of growth ; 

 suture distinct, channeled ; body-whorl convex in front of the 

 shoulder, sculptured with nine or ten spiral threads having 

 slightly wider interspaces which occasionally contain very fine 

 intercalary lines ; the spiral threads replaced by seven or eight 

 striations on the anterior portion of the body-whorl ; aperture 

 ovate, with simple outer lip; canal short; columella twisted; 

 posterior sinus broad and moderately deep. 



Dimensions : — Altitude of the type, with defective apex, 9 

 mm. ; diameter of the last whorl, 4.5 mm. 



Type : — No. 231, and cotype No. 232, Cal. Acad. Sci., Oligo- 

 cene( ?) (or Miocene?) of northwestern Oregon. 



Genus MANGILIA Risso 



Mangilia kernensis, new species 



Plate 7, figures 6a and 6b. 



Shell slender and small, fusiform, with seven or eight whorls, 

 spire high with an acute apex; whorls angulated a little above 

 the middle, concave above, convex below, sculptured with 

 twelve to fourteen axial ribs and about ten spiral threads, five 

 of moderate size below the angle and four or five very fine 

 spiral lines above the angle; axial ribs most prominent below 

 the angle and rising to small nodes on the shoulder ; interspaces 

 equal in width to the ribs and frequently carrying intercalary 

 lines; suture distinct, appressed; body-whorl ornamented with 

 ten to twelve spiral threads between which are secondary spiral 

 lines; aperture elliptical, with a simple outer lip; columella 



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