42 University of Washington Publications in Geology [Vol. 1 



GENUS TELLINA LINNEUS 



TELLINA LINCOLNENSIS n. sp. 



Plate III, Figure 30 



Description Shell small, moderately convex and sub-rectangular in outline; 

 beaks fairly prominent, directed forwards and situated a distance of two-thirds the 

 length of the shell from the anterior end; anterior dorsal slope very slightly con- 

 vex and elongate; anterior margin evenly but sharply rounded; posterior dorsal 

 margin concave and merging into an evenly rounded posterior margin; basal margin 

 evenly and broadly rounded. Surface sculptured by moderately developed con- 

 centric lines of growth only ; a very slightly elevated ridge extends from beaks to 

 lower portion of posterior end of shell; posterior end slightly deflected to the 

 right; pallial sinus of medium length. 



Dimensions Altitude 7 mm.; longitude 12 mm.; thickness 3 mm. 



Occurrence At locality 256 (University of Washington Palaeontological Col- 

 lection) in railway cuts on the O.-W. R. R. & N. Co. one fourth mile northwest 

 of Lincoln Creek Station in Section 27, Township 15 North, Range 3 West. 



Horizon Lowermost Oligocene; Molopophorous lincolnensis Zone. 



TELLINA COWLITZENSIS n. sjp. 

 Plate II, Figure 14 



Description Shell large thin, compressed and about two-fifths longer than 

 high; beaks a little anterior to the center and moderately prominent; anterior 

 dorsal margin slopes downwards at a low angle and then becomes evenly and 

 sharply arcuate and merges into a long but nearly straight base; posterior dorsal 

 margin slopes downward sharply at first and then at a lower angle in a slightly 

 sinuous manner to the posterior end where it is obliquely truncated; a well defined 

 ridge passes from the beak to the posterior basal angle on the right valve; just 

 anterior to this ridge there is a long groove like depression which becomes more 

 pronounced near the base. Surface ornamented by numerous moderately strong 

 concentric lines of growth which are irregularly spaced; radiating ribs are absent. 



Dimensions Altitude 37 mm.; longitude 57 mm.; thickness 5 mm. 



Occurrence At locality 248 (University of Washington Palaeontological Col- 

 lection) one and one-fourth miles down stream from the Innman-Polson Logging 

 Company's Store in a gray sandstone in bank of Coal Creek, Cowlitz County, Sec- 

 tion 11, Township 8 North, Range 3 West. 



Horizon Upper Eocene; Tejon formation. 



