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



the angulation; aperture elliptical, outer lip thickened by a 

 varix ; inner lip simple ; canal short and recurved. 



Dimensions : — Altitude of the figured specimen, canal de- 

 fective, 1 1 mm. ; diameter of the last whorl, 5 mm. 



Occurrence : — Found in the lower Miocene of Kern River 

 and eastern San Luis Obispo County, California. 



Type: — No. 163, Cal. Acad. Sci., Kern County, California, 

 in the bottom of a small creek 1 V4 miles due north of Barker's 

 ranch house. 



Nassa blakei, new species 

 Plate 7, figures 15a and 15b. 



Shell small, ovate, solid, with five or six whorls ; spire ele- 

 vated ; whorls of the spire slightly convex, sculptured with four 

 or five spiral lines, and twelve to fifteen raised axial ribs, most 

 prominent at the middle of the whorls ; the intersection of the 

 axial ribs and the spiral lines producing small nodes; suture 

 distinct, impressed ; body-whorl large, about one half the total 

 length of the shell, with prominent spiral ridges on the anterior 

 and posterior margins, concave centrally, sculptured with 

 numerous spiral lines and axial lines of growth ; aperture sub- 

 quadrate; outer lip thickened, denticulate within; inner lip 

 incrusted, roughened ; canal very short and broad. 



Dimensions : — Altitude, 9 mm. ; maximum width of the shell, 

 5 mm. ; length of the aperture, including the canal, 4 mm. ; 

 width of the aperture, 2 mm. 



Occurrence : — One specimen, the type, from the lower Mio- 

 cene of Kern River, California, locality 65. 



Type: — No. 164, Cal. Acad. Sci., Kern County, California, 

 on the west bank of a small canyon P/4 miles northeast of 

 Barker's ranch house. 



Named in honor of Mr. W. P. Blake. 



Nassa antiselli, new species 



Plate 7, figure 16. 



Shell small, ovate; spire conical, elevated, with five nodose 

 whorls ; whorls slightly convex, tabulated, sculptured with three 

 equally spaced spiral cords and about thirteen axial ribs which 

 are equal in prominence to the spiral cords ; the intersection of 



