194 



channeled. Periphery of the last whorl marked by a broad sul- 

 cus, equalling that which separates the supraperipheral from the 

 median cord, crossed by the continuations of the axial ribs. Base 

 marked by a strong, broad, rounded cord immediately below the 

 periphery and a 2d less strong on its middle, while a slender 

 thread encircles the insertion of the columella. In addition to 

 this sculpture, the base is marked by strong, incremental lines. 

 Aperture irregularly oval, decidedly channeled anteriorly; pos- 

 terior angle obtuse; outer lip thin, showing the external sculp- 

 ture within, rendered sinuous at the edge by the external sculp- 

 tur; columella stout, curved, strongly twisted, with the edge re- 

 flected; parietal wall glazed with a thick callus." 



Type locality: — off Del Monte, Monterey, Cal., in 12 fms. (S. 

 S. Berry). 



Also known from San Pedro bay, Cal. 



2991 Cerithiopsis (Cerithiopsis) cesta 

 Type locality: — San Diego, Cal. 



2992 C. (C.) Stejnegeri 



Type locality: — Bering Island. 



2993 Variety dina. Sitka, Alaska. 



2994 C. (C.) halia 



Type locality: — Todos Santos bay, Baja Cal. 



2995 C. (C.) aurea 



2996 C. necropolitana 



Lower San Pedro series, Deadmans Island, Cal. 



2997 C. diegensis 



Type locality: — San Diego, Cal. 



2998 Cerithiopsis (Cerithiopsida) Rowelli 

 Probably Californian. 



2999 Cerithiopsis (Cerithiopsidella) antefilosa 



Type locality: — off Point Loma, Cal. — San Pedro bay, Cal. 



3000 Cerithiopsis (C.) alcinia 



Type locality: — Whites Point, San Pedro, Cal. 



3001 Cerithiopsis excelsa 



Oregonian Eocene of North Fork of Umpqua river. 

 2003 Cerithiopsis fossilis 



Lower San Pedro series, Deadmans Island, Cal. 



3003 Cerithiopsis gloriosa 

 California. 



3004 Cerithiopsis columna Cpr. 



Type locality: — Neah bay, Washington (J. G. Swan). — Mon- 

 terey, Cal. 



3005 Cerithiopsis paramoea 



Type locality: — Neah bay, Washington. 



3006 Cerithiopsis Arnoldi 



Type locality: — San Pedro bay, Cal. (Ralph Arnold). 



3007 Cerithiopsis antemunda 



Type locality: — San Pedro bay, Cal. — San Diego, Cal. 



3008 Cerithiopsis diomedeae 

 Type locality: — San Diego, Cal. 



3009 Cerithiopsis Williamsoni 

 Synonymy: — Bittium williamsoni Arnold. 

 Type locality: — Pleistocene of San Pedro, Cal. 



3010 Cerithiopsis truncata Dall. 



Type locality: — Unalaska, in the canals of sponges. 



3011 Cerithiopsis stephensae 



Type locality: — Bear bay, Peril Strait, Baranoff Island, Alas- 

 ka (Mrs. Kate Stephens). — Puget Sound, Washington. 



3012 C: Montereyensis. Monterey bay, Cal. 



