52 University of Washington Publications in Geology [Vol. 1 



which are very prominent on the posterior surfaces and angulated portions of 

 whorls but which become obscure on the anterior half of the body whorl ; posterior 

 slope of whorl between suture and angle is ornamented by three well defined 

 rounded revolving ribs with interspaces of double width ; three similar ribs occur 

 upon the angulated areas and four on the surface between the posterior and anterior 

 angulations; surface of body whorl below anterior angle ornamented by twenty- 

 five well defined ribs ; intervening revolving threads are entirely absent from the 

 ornamentation of this species. Aperture elongate-oval; canal long, deep and 

 straight; outer lip simple; inner lip slightly callused. 



Dimensions Altitude of shell 35 mm.; altitude of spire 21 mm.; maximum 

 diameter of shell 8 mm. ; angle of spire 20. 



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 TURRIS BOLTEN 

 TuRRIS CLALLAMENSIS n. Sp. 



Plate IV, Figure 59 



Description Shell large and solid with nine or ten whorls which are mod- 

 erately inflated ; each whorl is sharply angulated by well defined carniae at or 

 just a little below the central portions; immediately below the posterior carina or 

 angle a second less well developed angle is present which is more conspicuous on 

 the body whorl and less well upon the whorls of the spire; surface of whorls 

 above angle slightly concave; suture distinct; surface of body whorls below angles 

 ornamented by sixteen revolving ribs which are crossed by numerous closely set 

 longitudinal lines of growth. Aperture very narrow; inner lip smooth and cal- 

 lused ; outer lip smooth ; canal elongate and straight. 



Dimensions Altitude of shell 85 mm.; altitude of spire 38 mm.; maximum 

 diameter of shell 28 mm.; angle of spire 30. 



Occurrence At locality 258 (University of Washington Palaeontological Col- 

 lection) one half mile west of Twin River, Clallam County, in Section 22, Town- 

 ship 31 North, Range 10 West. 



Horizon Lower Miocene ; Area montereyana Zone. 



TURRIS WYNOOCHEENSIS n. sp. 

 Plate V, Figure 65 



Description Shell small and solid with five and one-half whorls, each of 

 which is sharply angulated; spire of about same length as body of whorl; body 



