162 PALAEONTOLOGY OF CALIFORNIA. 



Dimensions of a small specimen : Length, .68 inch ; width of body whorl, .67 

 inch ; length of aperture, .52 inch. 



From the Martinez Group, Martinez ; Mr. Mathewson. 



A variable shell, the greatest variation being in the shape of the body whorl, 

 some specimens being much more expanded and oblique than others. 



TEREBRA, Brug. 



T. CALIFORNICA, n. s. 



PL 27, Fig. 41. 



SHELL small, slender, elongated, sides flattened; whorls eleven, 

 flattened on the sides, the body whorl slightly convex a little 

 below the middle, and excavated below. Surface ornamented by 

 small, slender, and slightly sinuous longitudinal ribs, the upper 

 margin of the whorl bordered by a slightly thickened rim. Aper 

 ture elongate, outer lip simple, inner lip incrusted, canal a little 

 deflected and twisted, notch very small. 



Length, .52 inch ; width of body whorl, .08 inch ; length of aperture, .11 inch. 

 From the Tejon Group, Martinez ; a single specimen found by Mr. Mathewson. 



CHEMNITZIA, d'Orb. 

 C. PLANULATA, Gabb. 



(C. Spillmanni, Gabb (not Con.); Pal. Cal., Vol. 1, p. 115, pi. 19, fig. 70.) 



On examining Mr. Conrad's original specimen, I am inclined to agree with him 

 that there are some good points of specific difference, and therefore propose the 

 above name. 



PUGNELLUS, Con. 

 P. HAMULUS, Gabb. 



PL 27, Fig. 42, 42 a, 

 (P. hamulus, Gabb; Pal. Cal., Vol. 1, p. 81, pi. 20, fig. 124; pi. 18, fig. 48.) 



This shell is extremely variable from the changes of age. The two figures 

 quoted above give a young shell, and one that has acquired its lip and incrustation. 



