TERTIARY FOSSILS. / 



two nuclear whorls rather loosely twisted and more convex than 

 the others; suture deep; body whorl nearly half of the entire 

 length of the shell. Aperture broadest in the middle, narrowing 

 regularly in advance; inner lip moderately incrusted; outer lip 

 simple; sinus rather broad, shallow, rounded, and adjoining the 

 suture-; canal of variable length, often much larger than in the 

 specimen figured. Color, in living specimens, a light reddish- 

 brown. 



Figure, natural size. 



Locality: San Pedro, from the Post-Pliocene; not rare. Also found living, by 

 Dr. Cooper, at a depth of sixty fathoms, off Santa Catalina Island. 



P. Voyi, n. S. 



PI. 1, Pig. 11. 



Shell somewhat resembling the preceding species, but dextral 

 and much broader; spire elevated; whorls perhaps seven or 

 eight (apex broken), very convex; suture deep. Surface smooth, 

 or only marked by lines of growth. Aperture broad ; inner lip 

 incrusted; outer lip acute; posterior sinus deep, rounded at the 

 base, placed a little distance from the suture; canal slightly bent. 



Figure, very slightly magnified; about one-fourth inch longer than the spe- 

 cimen. 



Locality : Found by Mr. Voy near Humboldt Bay, below Bear River, Humboldt 

 County: Miocene or Pliocene (?). 



CLATHURELLA, Carpenter. 

 Defrancia, Millet, non Mull. 



C. CONRADIANA, n. S. 

 PI. 1, Fig. 12. 



Shell small, robust, broadly fusiform; spire high; whorls 

 seven and a half, the first smooth and round, the remainder an- 



