202 CALIFORNIA ACADEMY OF SCIENCES [Proc. 30 Ser. 



This species is unlike C. califoruica Gabb in having a 

 lower and less rounded spire, a less ovate outline, and a 

 narrow straight aperture. 



Occurrence. — This shell occurs in the Lower Miocene beds 

 of Kern River. 



Purpura lima Martyn. 



Plate XV, Figs. 62 and 63. 



Purptira lima Martyn, Conch, fig. 47. 



Purpura lima (Mart.) Tryon, Man. Conch, v. 2, p. 175, pi. liii, figs. 156, 

 158, 159, and 161. 



Among the many moUuscan species originally described 

 in obscure or inaccessible literature is the above. Authentic 

 samples of this shell are in the collections of the California 

 Academy of Sciences, and the identitication of the fossil 

 species is from a comparison with these. The fossil speci- 

 mens are a little shorter, with a less elevated spire, but the 

 difference seems to be insignificant. 



Ocairrence. — The four or five samples of this species that 

 have been found fossil are from the Lower Miocene beds of 

 Kern River. 



Trophon kernensis n, sp. 



Plate XVI, Figs. 64 and 65. 



Shell rather large, length from 2-3 inches, width ij4 inches; graceful in 

 outline, narrowing rapidly before; spire rather short, conical, and angular, 

 but sloping above, bearing tubercules, or very short spines on the angles, 

 more prominent on very young shells; surface ornamented chiefly by lines 

 of growth, but bearing faint spiral lines on the lower part of the whorl, 

 noticeable especially in young shells; aperture pear-shaped, and narrowing 

 to a long canal; inner lip crusted; canal long and narrow. 



This species is only distantly related to T. ponderosum 

 Gabb, but more nearly related forms are found in the Pliocene 

 of California. 



Occurrence. — This shell is from the Lower Miocene beds 

 of Kern River. 



