1916] Weaver: Tertiary Faunal Horizons 55 



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. 



TURRIS PACKARDI n. Sp. 



Plate V, Figure 64 



Description Shell small and fusiform ; spire moderately elevated and about 

 one and two-fifths as long as the canal; whorls eight in number and very angular; 

 a well developed keel is present upon the angulated area of each whorl ; surface 

 of whorl above angle is very slightly concave and ornamented by very faint re- 

 volving lines ; the middle portion of each whorl has two very prominent revolving 

 cord like ribs with very narrow groove like interspaces ; anterior surface of body 

 whorl sculptured with 13 revolving ribs which are less well defined than those 

 upon the middle portion; interspaces on lower portion very narrow; lines of growth 

 quite prominent and conforming to the outline of the posterior sinus. Suture dis- 

 tinct ; aperture sub-pyriform ; canal of moderate length and deeply channeled. 



Dimensions Altitude of shell 24 mm. ; altitude of spire 9 mm. ; maximum 

 diameter of shell 11 mm.; angle of spire 42. 



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. 

 GENUS ACTEOCINA GRAY 



ACTEOCINA CHEHALISENSIS n. Sp. 



Plate IV, Figures 55 and 56 



Description Shell small and moderately elongate; spire about one-fifth as 

 long as body whorl and consisting of four whorls; surface of body whorl sculp- 

 tured by thirty-two nearly flat topped revolving ribs with interspaces, every alter- 

 nating one of which is twice as wide as the ribs; suture distinct; aperture narrow 

 behind and wide in front ; outer lip smooth ; inner lip callused with the callus ex- 

 tending around the anterior end of the non-channeled canal; a very faintly devel- 

 oped groove extends around the base of the body whorl. 



Dimensions Altitude of shell 10 mm.; altitude of spire 3 mm.; maximum di- 

 ameter of shell 6 mm.; angle of spire 50. 



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. 



