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



Cancellaria condoni Anderson 

 Plate 8, figures 8a, 8b, 8c, and 8d. 



Cancellaria condoni Anderson, Proc. Calif. Acad. Sci., 3rd 

 Series, Geo!., Vol. 2, p. 200, pi. 15, fig. 49-50, 1905. 



This species is refigured here in order to illustrate its varia- 

 tions and to point out more clearly the characters by which it 

 may be distinguished from the new species of Cancellaria that 

 are here described. 



Cancellaria dalliana Anderson 



Plate 8, figures la, lb, Ic, and Id. 



Cancellaria dalliana Anderson, Proc. Calif. Acad. Sci., 3rd 

 Sen, Geol, Vol. 2, p. 199, pi. 15, fig. 39-40, 1905. 



Refigured with Cancellaria condoni Anderson, see above. 



Cancellaria posunculensis, new species 

 Plate 8, figures 7a, 7b, and 7c. 



Shell small, ovate-elongate, with six whorls ; spire high ; 

 whorls convex, sculptured with about eight spiral threads which 

 are separated by narrower interspaces carrying intercalary 

 lines; axial sculpture consisting of close-set lines of growth, 

 much less pronounced than the spiral threads ; the intersection 

 of the axial and the revolving lines producing a delicately can- 

 cellated surface ; suture distinct, impressed, bordered anteriorly 

 by a small tabulation; body-whorl large, about three-fourths 

 the total length of the shell, gracefully convex, ornamented 

 with eighteen major spiral threads between which are smaller 

 intercalary lines ; axial sculpture same as on the whorls of the 

 spire ; aperture elliptical ; outer lip arcuate, denticulate within ; 

 canal short, curved ; columella long and recurved, carrying 

 three plications, two of them slightly larger than the third. 



Dimensions: — Altitude of the type, 17.5 mm.; maximum 

 diameter of the body-whorl, 8 mm. ; length of the aperture, in- 

 cluding the canal, 10 mm. 



Type : — No. 202, and cotypes Nos. 203 and 204, Cal. Acad. 

 Sci., lower Miocene of Kern River, California, locality 65. 

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

 Barker's ranch house. 



