Vol. IV] ANDERSON AND MARTIN— NEOCENE RECORD 83 



ance, sculptured with distinct spiral cords separated by nar- 

 rower interspaces, eleven or twelve on the penultimate whorl; 

 body-whorl large, about two-thirds the total length of the shell, 

 angulated near the middle, concave above, almost flat below 

 and narrowing rapidly to the canal, with eight prominent nodes 

 on the angulation, eight spiral cords above the shoulder and 

 about eighteen below; aperture elliptical, outer lip angulated, 

 inner lip smooth; columella stout, incrusted, with anterior 

 sulcus ; canal short, recurved. 



Dimensions : — Altitude of the figured specimen, apex de- 

 fective, 30 mm. ; maximum latitude of the shell, 16 mm. ; length 

 of the aperture, including the canal, 20 mm. ; width of tlie 

 aperture, 8 mm. 



Type: — No. 182, Cal. Acad. Sci., lower Miocene of eastern 

 San Luis Obispo County, California, locality 126, in the bed 

 of a small creek near the center of Sec. 34, T. 28 S., R. 15 E. 



Thais nehalemensis, new species 

 Plate 6, figure 3. 



Shell solid, fusiform, with about six whorls ; spire moder- 

 ately elevated ; apex acute ; whorls of the spire concave with a 

 raised anterior margin or collar which is ornamented with 

 twelve to fourteen prominent nodes, the nodes partly obscured 

 by the overlapping of the succeeding whorl; concave area 

 smooth or marked by very fine spiral lines; suture indistinct 

 due to the overlapping of the whorls ; body-whorl large, more 

 than three-fourths the total length of the shell, angulated near 

 the middle, concave above, ornamented with thirteen prominent 

 nodes and numerous revolving threads of three or more ranks 

 which alternate regularly; nodes most prominent at the angle, 

 fading out above and on the anterior portion of the whorl ; the 

 spiral threads most prominent on the nodose area; aperture 

 oval, outer lip simple, inner lip incrusted, smooth; posterior 

 sinus broad and shallow ; canal short and broad, recurved. 



Dimensions : — Length of the shell, 33 mm. ; maximum diam- 

 eter of the body-whorl, 19 mm. ; length of the aperture and 

 canal, 21 mm. ; width of the aperture, 8 mm. 



Type : — No. 183, Cal. Acad. Sci., Oligocene or lower Mio- 

 cene beds ten miles northwest of Scappoose, Columbia County, 

 Oregon. 



