50 University of Washington Publications in Geology [Vol. 1 



GENUS MOLOPOPHOROUS GABB 



MoLOPOPHOROUS LINCOLNENSIS n. Sp. 



Plate IV, Figures 60 and 61 



Description Shell small, solid with four and one-half whorls ; spire about 

 one-third the length of body whorl; apex of spire usually smooth; body whorl 

 moderately convex and upper margin developed into a cord like ridge which is 

 entirely free from nodes and situated just below the suture; surface of body 

 whorl slopes down very sharply from the collar and develops a rather pronounced 

 concave constriction just above the convex portion of whorl. Suture well defined 

 and deep; sculpture of shell consists almost entirely of fairly defined longitudinal 

 lines of growth together with nine axial ribs confined chiefly to the middle portion 

 of the whorl; nodes are entirely absent. Aperture semi-elliptical; outer lip smooth; 

 inner lip covered with well marked callus; anterior end of aperture extended into 

 a short canal moderately excavated and deeply notched and recurved so as to 

 form a strong siphonal fasciole. 



Dimensions Altitude of shell 25 mm.; altitude of spire 5 mm.; maximum di- 

 ameter of shell 14 mm.; angle of spire 62. 



Occurrence At locality 256 (University of Washington Paleontological 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 CANCELLARIA LAMARCK 

 CANCELLARIA WYNOOTCHENSIS n. sp. 

 Plate IV, Figures 51, 52 53 and 54 



Description Shell of moderate size, solid with five whorls; spire about equal 

 in length to body whorl and canal; whorls convex and sub-tabulated on upper sur- 

 face; suture distinct and slightly channelel; surface moderately reticulate and 

 ornamented by twenty-two prominent longitudinal ribs which are equally devel- 

 oped on whorls of spire as well as on the body whorl; on the latter they extend 

 to the end of the canal; on the body whorl the longitudinal ribs are crossed by 

 fifteen distinct revolving ribs and alternating with each of these are fine revolving 

 threads. Aperture semi-elliptical; outer lip not determinable ; inner lip heavily 

 callused; canal short and slightly deflected outwards; two rather distinct plications 

 are present on the lower end of the collumela; canal short and twisted to left with 

 siphonal fasciole. 



Dimensions Altitude of shell 27 mm.; altitude of spire 11 mm.; maximum 

 diameter of shell 16 mm.; angle of spire 60. 



