1918] I 'an Winkle: Paleontology of the Oligocene 91 



(iKxus CANCELLARIA LAMARCK 



('. \NCELLARI A LANDESI n. sp. 



Plate VII, Figure 17 



Description Shell small; whorls five in number; body whorl greatly enlarged; 

 whorls angulated and decorated with four broad, flat topped revolving ribs with 

 interspaces of equal width; the upper rib lies upon the angulated portion of the 

 whorl ; body whorl ornamented by seven broad, prominent, revolving ribs with equal 

 interspaces. There is a prominent shoulder on body whorl a short distance below 

 the suture; ten prominent axial ribs cross the revolving ribs, giving the surface an 

 angulated appearance. Suture distinct and slightly sinuous ; aperture oval and 

 slightly notched at the anterior end; outer lip thin and slightly crenulated ; inner 

 lip slightly calloused; canal very short; columella with one strong oblique fold. 



Dimensions Altitude of shell 7 mm. ; altitude of spire 2 mm. ; maximum diam- 

 eter of shell 5 mm.; angle of spire 61. 



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 TURRIS BOLTEN 

 TURRIS WORCESTERI n. Sp. 



Plate VII, Figure 21 



Description Shell small or slender with six or seven whorls; the middle 

 portion of the whorls are marked by broad, sharply angulated, revolving folds ; on 

 the surface between these folds and the suture are two revolving ribs. Body whorl 

 is ornamented with 14- revolving ribs with interspaces of equal width; the first two 

 ribs just below the prominent revolving fold are moderately prominent, the others 

 decreasing in size as they approach the anterior end; aperture elongate-elliptical, 

 wider posteriorly; canal short, wide and twisted to the left; inner lip calloused. 



This species differs from Turris thurstonensis Weaver in the fact that in all 

 specimens of the species there are two constant revolving ribs between the suture 

 and the angulated portion of the whorls. The intercalary threads are also absent 

 between the revolving threads. The adult specimens of the species are smaller 

 than in the case of Turris thurstonensis. 



Dimensions Altitude of shell 10 mm.; altitude of spire 1 mm.; maximum 

 diameter of shell 11 mm.; angle of spire 41. 



Occurrence At locality 352 (University of Washington Paleontological Col- 

 lection) in railroad cuts of the O.-W. R. R. & N. Co., one-fourth mile west of Lincoln 

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



Horizon Lower Oligocene; Molopophorous lincolnensis Zone. 



