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



are more numerous than those of F. hornii, its shoulder is 

 more sloping and the three carinas are equally spaced instead 

 of having a markedly different spacing as in the other species. 



Ficopsis cooperii is much closer to F. hornii than to other 

 members of this genus, but its square shoulder is without even 

 the small slope of F. hornii, its spiral threads are finer and the 

 three rows of nodes are unequally spaced but in reverse order 

 the two upper rows being the closer together. 



The range of these species brings out some interesting re- 

 lationships. F. remondii, F. hornii and F. cowlitsensis are as- 

 sociated at the type locality on the Canada de las Uvas. F. 

 cooperii and F. remondii are found at San Diego. The general 

 assemblage of forms at San Diego and the type Tejon repre- 

 sent the same faunal zone. Ficopsis cooperii also occurs in the 

 Siphonalia sutterensis Zone of Oregon. It is apparent from 

 this distribution that these forms are not directly evolved in a 

 simple time order, that is, one form does not appear to have 

 originated from another but they appear to represent end 

 members of branchings from a common ancestor of an earlier 

 period and possibly sometime when well preserved species of 

 this genus are found in the Martinez group, a more nearly 

 complete history of the group may be written. 



Pseudoliva inornata, new species 

 Plate 7, figures la, lb, Ic 



Shell pyriform, solid with thick shell; six whorls; the flat 

 sided spire forming a cone which rests upon the body-whorl 

 whose upper portion has a slightly lesser slope than the spire ; 

 body-whorl slightly swollen, elongate; suture linear; canal 

 short, reverted; siphonal fasciole moderately developed; dec- 

 oration consisting of axial growth lines only. 



The lack of marked decoration and the nearly smooth sur- 

 face of the shell, and the elongate form are characters which 

 separate this species from other West Coast Eocene forms 

 belonging to the genus Pseudoliva. 



Dimensions: — Length, 32 mm.; width of body-whorl, 18 

 ' mm. 



Type: — No. 11053, University of California. Locality 458, 

 Tejon Quadrangle. Tejon group. West side of Grapevine 

 Creek, elevation 2050 feet, about four and one-half miles S. 



