CRETACEOUS FOSSILS. 147 



Figure, natural size. 



Locality : Not rare in Division B., at Bull's Head Point, near Martinez. Also 

 found at Marsh's, east of Mount Diablo ; and at Alizos Creek, near Fort Tdjon. 



PHARELLA, Gray. 



P. ALTA, 11. S. 

 PL 22, Fig. 118. 



Shell elongated, narrow ; beaks about a third of the distance 

 from the anterior end, high, acute. Cardinal margins sloping 

 slightly concavely from the beak ; basal margin nearly straight. 

 Ends rounded; the posterior the narrowest, and slightly expanded. 

 Surface mai'ked by a few indistinct lines of growth. 



Figure, twice natural size. 



Locality: In most of the hills west of Martinez (in Division A.). 

 This shell is smaller than P. Dakotensis, Meek and Hayden, and differs in the 

 beaks being higher and placed nearer the anterior end. 



SILIQUA, Muhlf. 



Leguminaria, Schum. 

 S. Oregonensis, n. s. 



PI. 29, Fig. 237. 



Shell subelliptical, slightly convex; beaks placed about a third 

 of the length from the anterior extremity. Cardinal margin 

 nearly straight; basal broadly curved. Anterior end regularly 

 rounded ; posterior oblkpiely truncated above. Internal ribs 

 small, narrow, and oblique. Surface unknown. 



Figure, natural size. 



Locality: Two casts, with the shell entirely decomposed ; from the north side of 

 the Siskiyou Mountains, Oregon, near the Toll House, on the stage road. Collec- 

 tion of Prof. Whitney. 



