58 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



Turritella uvasana bicarinata, new variety 

 Plate 5, figure 2 



This variety which is found associated with the typical T. 

 uvasana at Cal. Acad. Sci. Locality 244 differs from the typi- 

 cal form in that the lower portion of the whorls are marked 

 by two unusually strong carinse with a thread between. Inter- 

 grades are found between this form and the typical T. uvasana. 

 These two carinse give the whorls a form somewhat similar 

 to T. martinesensis of the Martinez group and quite different 

 from the well rounded whorls of the typical T. uvasana. 



Type : — No. 285, Cal. Acad. Sci. Locality 244, Tejon Quad- 

 rangle, Kern County, California. Tejon group. In east bank 

 of Live Oak Creek about three-fourths of a mile from its 

 mouth or from the edge of the San Joaquin Valley and about 

 three miles due east of the mouth of Grapevine Canyon. Coll., 

 Bruce Martin. 



Turritella uvasana tricarinata, new variety 

 Plate 5, figure 4 



This variety also occurs with the above described variety 

 which it resembles closely but differs by having three strong 

 carinse instead of two. 



Type : — No. 287, Cal. Acad. Sci. Locality 244, Tejon Quad- 

 rangle, Kern County, California. Tejon group. In east bank 

 of Live Oak Creek about three-fourths of a mile from its 

 mouth or from the edge of the San Joaquin Valley and about 

 three miles due east of the mouth of Grapevine Canyon. Coll., 

 Bruce Martin. 



Nerita cowlitzensis, new species 

 Plate 5, figures 7a, 7b 



Shell very small with spire immersed; whorls three, rapidly 

 increasing in size; surface of subglobose body-whorl divided 

 into three portions by a strong spiral line at the shoulder and 

 a second medial one; mouth semilunar; outer lip thickened, 

 dentate; callus heavy, closing umbilicus completely; beaded 

 spiral threads crossed by axial ribs decorating shell. 



