122 



University of California Publications. 



[Geology 



Dimensions : — The length from the broken end of the eanal 

 to the apex is 27 mm. The maximum width of the body whorl 

 is 19 mm. 



Occurrence : — Southwest of Martinez and west of the Del 

 Hambre Canon road. It has also been found at Benicia, on the 

 U. S. arsenal grounds, about two hundred yards northwest of 

 Army Point railroad station, and in southern Lake County, 

 about one mile southeast of the town of Lower Lake. It occurs 

 in both the upper and lower beds. 



Bullinula subglobosa, n. sp. 



Pl. 13, Fig. 8. 



The shell is small and sub-globose. The spire is low but acute. 

 The whorls number five. The aperture is broad. The surface 

 is marked by regular lines of growth and by numerous very fine 

 impressed revolving striae. 



Dimensions: — The height is 8 mm. and the width 5 mm. 



Occurrence : — About three and one-half miles south of Mar- 

 tinez and west of the road to Walnut Creek. It occurs only in 

 the upper beds. 



Actaeon lawsoni, n. sp. 



Pl. 13, Fig. 10. 



The shell is subovoid and elongated. The number of Avhorls 

 is Jive. They are very regularly rounded. The suture is chan- 

 neled. The entire surface of all the whorls is marked by numer- 

 ous narrow revolving ribs. There are thirty-two ribs on the body 

 whorl, and these are connected by numerous veiy minute lines. 

 The aperture is narrow. The extremity of the columella shows 

 distinct plications. 



Dimensions : — The length from base to apex is 9.5 mm., and 

 the maximum width of the body whorl is (> mm. The specimens 

 appear to be slightly compressed. 



Occurrence : — Three miles southwest of Martinez and west of 

 the Del Hambre Canon road. It occurs only in the lower beds, 

 but near the top of that division. 



