Vol. IV] ANDERSON AND MARTIN— NEOCENE RECORD 79 



suture forming a distinct sutural collar, sculptured with numer- 

 ous spiral cords having narrower interspaces ; the width of the 

 cords and the interspaces varying considerably, on the anterior 

 portion and just above the shoulder of the body-whorl the cords 

 alternating large and small ; in the middle portion nearly equal, 

 with one broad spiral band at the shoulder ; the axial sculpture 

 consisting of inconspicuous lines of growth; suture strongly 

 appressed ; body-whorl large, about two thirds the total length 

 of the shell; aperture elliptical, outer lip ribbed within, inner 

 lip smooth, calloused; canal short, wide, recurved; columella 

 twisted, with small anterior sulcus. 



Dimensions : — Altitude of the type, apex defective, 62 mm. ; 

 maximum latitude of the shell, 28 mm. ; length of the aperture, 

 including the canal, 31 mm. ; width of the aperture, 12 mm. 



Occurrence : — Lower Miocene of Kern River and eastern 

 San Luis Obispo County, California. The type was obtained 

 from locality 65. 



Type: — No. 172, and cotype No. 173, Cal. Acad. Sci., Kern 

 County, California; on west bank of a small canyon P/4 miles 

 northeast of Barker's ranch house. 



Genus SIPHONALIA Adams 



Siphonalia posoensis, new species 



Plate 4, figure 2. 



Shell large, fusiform, solid, with seven or more whorls ; spire 

 high, conical; whorls angulated near the anterior margin, the 

 angulation ornamented with about nine prominent nodes ; sur- 

 face above the angulation nearly flat or concave; sculpture 

 consisting of spiral grooves and axial lines of growth; the 

 spiral grooves somewhat irregularly spaced and the spaces be- 

 tween them often raised forming spiral cords; body-whorl 

 angulated near the middle, concave above, convex below ; aper- 

 ture ovate ; outer lip arcuate ; inner lip smooth, incrusted ; canal 

 moderately long, curved to the left; columella incrusted, with 

 a long anterior sulcus. 



Dimensions : — Altitude, 90 mm. ; maximum latitude of the 

 last whorl, 45 mm. : length of the aperture, including the canal, 

 43 mm. ; width of the aperture, 17 mm. 



December 30, 1914. 



