1916] Weaver: Tertiary Faunal Horizons 53 



whorl sculptured with nine distinct revolving ribs below the angle and within the 

 interspaces there is a fine revolving thread; between the last upper revolving rib 

 and the angulated portion of the whorl there are five closely set very inconspicuous 

 revolving threads ; between the angle and suture there are ten similar lines ; this or- 

 namentation is crossed by numerous closely set lines of growth which conform 

 to the slightly developed posterior sinus; on the angle of each whorl there are 

 thirteen prominent nodes which disappear above and eblow. Aperture moderately 

 wide; outer lip sharp; inner lip slightly callused; canal slightly extended with 

 well defined sinus at the end; upper margin of each whorl developed into a collar 

 which partly covers the suture; angle of the body whorl very close to the suture. 



Dimensions Altitude of shell 23 mm. ; altitude of spire 1 1 mm. ; maximum 

 diameter of shell 8 mm.; angle of spire 37. 



Occurrence At locality 229 (University of Washington Palaeontological Col- 

 lection) in shaly sandstone on the east bluff of Wynoochee River one half mile 

 below mouth of Bitter Creek in Section 35, Township 18 North, Range 8 West. 



Horizon Lower Miocene ; Area montereyana Zone. 



TURRIS KINCAIDI n. Sp. 



Plate V, Figure 67 



Description Shell small and turreted; whorls eight in number; the middle 

 portion of the surface of each whorl is ornamented with a revolving keel along 

 the angle; the upper surface of each above the angle is nearly smooth except for 

 faintly developed revolving striae ; angulated portion sculptured by three cord like 

 rounded ribs with narrower grooved interspaces ; lower portion of body whorl with 

 fourteen similar cord like rounded ribs but with narrower grooved interspaces ; 

 the whorls are ornamented in addition by nineteen longitudinal ribs which form 

 nodes on the angulated portions of the whorls but which become obscure above 

 and below the angles ; the numerous fine lines of growth exhibit the sharp curva- 

 ture characteristic of the posterior sinus ; suture distinct ; aperture sub-pyriform ; 

 outer lip thin ; inner lip callused and with a faint groove separating the ornamented 

 portion of the whorl from the callused area ; canal moderately elongate and nearly 

 straight. 



Dimensions Altitude of shell 22 mm.; altitude of spire 13 mm.; maximum 

 diameter of shell 11 mm.; angle of spire 37. 



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. 



