80 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



Type: — No. 174, Cal. Acad. Sci., lower Miocene of 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. 



Genus MELONGENA Schum. 



Melongena californica, new species 



Plate 4, figure 1 



Shell of moderate size solid, pyriform, with a low spire; 

 whorls of the spire inconspicuous, unsculptured, three or four 

 in number; body-whorl inflated, broadest near the posterior 

 margin, the middle and anterior portion sloping downward to 

 the canal ; ornamentation consisting of two rows of nodes ; one 

 on the shoulder, and the other a little anterior to the middle, the 

 nodes are pronounced and number about five to a row ; aperture 

 oval, inner lip smooth incrusted; columella broad and heavy, 

 with prominent anterior sulcus ; canal defective, probably broad 

 and nearly straight. 



Dimensions : — Altitude, canal defective, 38 mm. ; width of 

 the last whorl, 29 mm. ; length of the aperture, including a 

 portion of the canal, about 30 mm. 



Type: — No. 175, Cal. Acad. Sci., lower Miocene of eastern 

 San Luis Obispo County, California, locality 60, on the top of 

 a prominent ridge one mile east of the San Juan River in the 

 N. W. cor. of the N. E. i/4, Sec. 3, T. 30 S., R. 17 E. 



This genus has not previously been reported to occur in the 

 Miocene of California. 



Genus TROPHON Montf. 

 Trophon oregonensis, new species 



Plate 5, figure 5 



Shell large, thick, fusiform, with six or seven angulated 

 whorls ; spire elevated ; whorls of the spire angulated near the 

 middle, surface flat and smooth above, smooth and sloping in- 

 ward below; whorls ornamented with nine or ten prominent 

 projecting spines which are excavated in front and convex 

 behind and extending downward to the suture in front forming 

 short varices; suture impressed, wavy; body-whorl ventricose, 



