Vol. IV] ANDERSON AND MARTIN— NEOCENE RECORD 77 



the spiral and axial ribs producing conspicuous nodes; suture 

 distinct, impressed; body-whorl ventricose, sculptured with 

 eight spiral cords and fifteen axial ribs, nodose as the whorls 

 of the spire; aperture elliptical; outer lip thickened by a con- 

 spicuous varix ; inner lip smooth ; columella short, with a small 

 anterior sulcus ; canal short and broad. 



Dimensions : — Altitude, 8.5 mm. ; diameter of the last whorl, 



5 mm. 



Occurrence : — Lower Miocene of San Luis Obispo County, 

 California, locality 126. 



This species can be distinguished by its small size, peculiar 

 nodose sculpture, and prominent varix on the outer lip. It is 

 more elongate and has much coarser sculpture than Nassa 

 arnoldi Anderson. 



Type: — No. 165, Cal. Acad. Sci., San Luis Obispo County, 

 California, in the bed of a small creek near the center of Sec. 

 34, T. 28S., R. 15 E. 



Named in honor of Dr. Thomas Antisell. 



Nassa lincolnensis, new species 

 Plate 7, figures 14a and 14b. 



Shell small, globose, with four or five rather rapidly enlarg- 

 ing whorls ; spire of medium height ; apex blunt ; whorls tabu- 

 lated, convex, sculptured with three spiral bands between which 

 are equal interspaces, and twelve axial ribs separated by wider 

 interspaces; the intersection of the axial and spiral ribs pro- 

 ducing nodes which are most prominent on the angle of the 

 whorls; body- whorl convex, with sixteen axial ribs and eight 

 flat topped spiral bands, the whole surface finely spirally striate ; 

 aperture ovate ; outer lip simple ; inner lip incrusted ; columella 

 very short with a distinct anterior sulcus. 



Dimensions : — Altitude, 10 mm. ; diameter of the last whorl, 



6 mm. 



Type: — No. 167, and cotype No. 168, Cal. Acad. Sci., Mio- 

 cene of the Oregon coast, a short distance north of Yaquina 

 Bay, locality 39. 



