Geol.— Vol. II.] ANDERSON— STRATIGRAPHIC STUDY 203 



Trophon gabbiana n. sp. 



Plate XVI, Figs. 79 and So. 



Shell not large, laminate, spinose on the angles; canal short, recurved; 

 spire high, sloping above; body whorl tapering below. The mouth narrows 

 regularly toward the canal. The spines are often considerably suppressed 

 on the angles, and on the lower part of the last whorl there are numerous 

 spiral lines. 



The shell differs from T. ponderoswn Gabb in having a 

 recui-\^ed columella, spiral lines below, and less prominent 

 spines. 



Ocaun^ence. — This shell occurs in the Coalinga Beds of the 

 Mount Diablo Range, nine miles north of Coalinga. 



Terebra cooperi n. sp. 



Plate XVI, Figs. 66 and 67. 



Shell of moderate size, tapering regularly; length i>^-2 inches, width of 

 body whorl >^ inch or less; aperture narrow and elongated, with simple 

 outer lip; surface ornamented with slightly sinuous vertical ribs or lines 

 closely set on the whorls; inner lip only slightly crusted; columella with a 

 narrow oblique fold on the outer side; the upper Y^ of the whorls bearing a 

 constricted band, not clearly shown in the figures. 



This species is undoubtedly related to Terebra wattsiana 

 Cooper,^ but is characterized by two or more distinguishing 

 marks, the depressed zone on the upper part of the whorls 

 and the narrow fold on the columella. A similar species 

 is found in the late Pliocene beds of San Diego, California. 



Occurrence. — This species is found in the Lower Miocene 

 beds of Kern River, but it is not abundant. 



Sigaretus scopulosus Conrad. 

 Plate XVI, Figs. 72 and 73. 



Sigaretus scopulosus Conrad, U. S. E.xpl. Exped. (Wilkes) pi. xix, figs. 6 



and 6a/ text p. 727. 

 Sinuni scopulosuui Conrad (Gabb), Pal. Calif, v. 2, p. 114, etc. 



Shell moderate in size, obliquely oval, slightly flattened above, hollowed 

 below; surface marked with revolving lines, equal in width with the inter- 



1 Bull. no. 4, Calif. State Min. Bur. 1894, p. 39. 



[4] October 25, 1905 



