100 CALIFORNIA ACADEMY OF SCIENCES [Piioc. 4th Ser. 



"Shell elongated, tapering, scaliform; whorls numerous, 

 sloping, straight, or somewhat concavely outwards above, an- 

 gulated and obliquely truncated below" ; suture impressed and 

 carinated by a small tubercular spiral rib. "Surface marked by 

 numerous fine, revolving thread-like lines, sometimes alternat- 

 ing in size, and on the angle near the lower margin of the 

 whorl, by coarse granulations. Aperture subquadrate." Lo- 

 cality 8, L. S. J. U. Pal. Coll. 



The apical angle of this species is much smaller than that 

 figured by Stanton as T. infragranulata. His specimen was 

 probably of the species T. simiensis, new species. 



Turritella martinezensis Gabb 

 PI. 14, Fig. 5 



T. martinezefisis Gabb, Pal. Cal., vol. 2, p. 169, pi. 28, fig. 51. 



Shell robust, apical angle broad; whorls 11, angulated, flat 

 above and below the angle; body whorl with two angles, the 

 lower less prominent and covered, during growth-, by outer 

 whorl ; surface marked by three strong lines on the upper face, 

 one between the revolving angles, and three below; besides 

 there are fine revolving lines, and faint striae of growth cover- 

 ing them all ; aperture broad, outer lip slightly sinuous ; inner 

 lip flattened and somewhat twisted. Localities 6, 7, and 8, L. 

 S. J. U. Pal. Coll. 



This species also occurs in the Martinez horizon at Martinez. 



Turritella uvasana Conrad 



PI. 15, Fig. 13 



T. uvasana Conrad, Pac. R. R. Rept., vol. 5, p. 321, pi. 2, 

 fig. 12; Gabb, Pal. Cal, vol. 1, p. 134, pi. 21, fig. 92; Arnold, 

 U. S. G. S. Bull. 398, p. 285, pi. 26, fig. 11. 



"Shell moderate in size, turreted, apical angle small; whorls 

 numerous and gradually increase in size, convex and orna- 

 mented by from 6 to 10 revolving, rounded ribs, with some- 

 times finer ones interpolated. Suture impressed. Aperture 

 circular. Locality 8, L. S. J. U. Pal. Coll. 



