Vol. IV] ANDERSON AND MARTIN— NEOCENE RECORD 81 



sharply concave at the anterior margin ; aperture ovate ; canal 

 moderately long, slightly twisted. 



Dimensions : — Altitude of the figured specimen, 58 mm. ; 

 maximum diameter of the last whorl, 40 mm. 



Type: — No. 176, Cal. Acad. Sci., Miocene of the Oregon 

 coast, four miles north of Yaquina Bay, locality 38. 



Trophon kernensis has a lower spire, angulation of the 

 whorls more anterior, and with nodes instead of excavated 

 spines. Trophon carisaensis Anderson, has a smaller number 

 of spines, angulation nearer the anterior margin, and a shorter 

 and much more thickened columella. Trophon gabbianus 

 Anderson, is a closely allied species with less prominent spines 

 and ornamented with many revolving cords and grooves on the 

 body-whorl below the shoulder. 



Trophon gabbianus Anderson 



Plate 5, figure 1. 



Trophon gabbiana Anderson, Proc. Calif. Acad. Sci., 3rd 

 Series, Geology, vol. 3, No. 2, page 203, PI. 16, fig. 79-80. 



This species is refigured in order to point out more clearly 

 the distinguishing characters of Trophon oregonensis, new 

 species. 



Genus THAIS Bolten 



Thais trophonoides, new species 



Plate 6, figures la and lb. 



Shell of moderate size, globose, solid, with five rather rapidly 

 enlarging whorls ; spire moderately elevated ; apex blunt ; 

 whorls of the spire angulated a little below the middle, flat 

 above and below, crossed by nine axial ribs and seven or eight 

 spiral cords; axial ribs most prominent on the angle of the 

 whorl ; interspaces between the spiral cords usuall}'' occupied by 

 a small intercalary thread ; suture appressed ; body-whorl large, 

 ventricose, angulated above the middle, marked by nine axial 

 ribs which are obsolete on the anterior portion, and numerous 

 spiral cords between which are intercalary threads ; aperture 

 pyriform; outer lip angulated above and below the middle; 

 columella twisted, with narrow groove and a deep anterior 

 sulcus ; canal recurved. 



