1918] I'an Winkle: Paleontology of the Oligocene 83 



from the beaks to the junction of the posterior and basal margin,, but becoming 

 less conspicuous at the posterior end. Surface of shell ornamented with well 

 developed concentric lines of growth as well as very fine radiating ribs. 



Dimensions Altitude 44 mm. ; longitude 67 mm. ; thickness 20 mm. 



Occurrence At locality 13 (University of Washington Paleontological Col- 

 lection) situated on the north side of Restoration Point, Kitsap County, Washington. 



Horizon Upper Oligocene; Blakeley Horizon. 



GENUS PAPHIA BOLTON 



PAPHIA LANDESI n. sp. 

 Plate VI, Figure 3 



Description Shell minute, approximately rectangular in outline, convex and 

 very inequilateral; beaks low and situated about one-fifth the length of the shell 

 from the anterior end ; posterior dorsal margin elongate and nearly straight, merging 

 abruptly into a sharply arcuate posterior margin. Ventral margin is straight and 

 parallel to the dorsal margin ; anterior dorsal margin slopes vertically from the beaks 

 and then extends downwards at an angle of about 60, where it curves sharply and 

 merges into the ventral margin. Exterior of shell characterized by very strong 

 ornamentation, especially on the posterior portion of the surface. Posterior surface 

 decorated with seven very prominent radial ribs which tend to become obscure 

 toward the beaks but which greatly increase in size at the posterior margin. Middle 

 surface of shell is ornamented with similar radiating ribs, which progressively 

 become less well defined, until at the anterior end they are scarcely perceptible. 

 The radiating sculpture is crossed by very prominent concentric ribs or lines of 

 growth which have a somewhat wavy outline. At the intersections of the radial 

 ribs and the lines of growth conspicuous scale like nodes have been developed. The 

 external ornamentation is impressed on the inner surface of the shell. 



Dimensions Altitude 3 mm. ; longitude 5 mm. ; thickness 4 mm. 



Occurrence At locality 330 (University of Washington Paleontological Col- 

 lection) situated at the Greece ranch, four miles east of Vader, on the east bank 

 of Cowlitz River, in Section 25, Township 11 North, Range 2 West. 



Horizon Lower Oligocene; lower phase of Molopophorous lincolnensis Zone. 



GENUS TELLINA LINNAEUS 



TELLINA GIBSONENSIS n. sp. 

 Plate VI, Figure 7 



Description Shell small, thin, inequilateral and smooth; beaks low, and situ- 

 ated about two-fifths the length of the shell from the anterior end; posterior end 



