2"»6 (AMKOKN'IA AIADKMY OF SCIKNTES. 



KalluT oomnidii in ii|i]i('i' San I'cdro set'ies atSiiii I'cdro; (nic in I'liufciH' at 

 Doatlinan Island; fonnd alx) in l-dWciSun Tcdro series at |)radnian l>land ami San 

 Pedro, and in tliu iii>|n.'r San Pt'dri) surit's at Crawlisli (ioui-gc's ami headman Island. 

 Found also in tiie Pleistocene at Pacific Beach, >San Diego. 



Living. — Sitka to San Diego (Cooper). 



Pleistocene. — Santa Barbara (Cooper): San Pedro; San J)iego (^Arnolil). 



Pliocene. — San Pedro (Arnold). 



261. Ocinebra keepi, sp. nov. 



Plate V, Fiu. i). 



Shell of medium size, fusiform; spire elevated, subacute; whorls live to six, strongly anjju- 

 lated above, giving a tabulate appearance to upper portion; whorls crossed by about seven sharp 

 frills, which fle.x forward, and rise to prominent points on the angle; anterior portion of whorl 

 ornamented with five or six strong, rough, subangular spiral lines, more prominent on lower 

 portion of w'horl; posterior ])ortion of whorl smooth between frills, except near suture, where the 

 surface is roughened ijy laminated, incremental lines; suture deeply appressed, undulating, distinct; 

 aperture subelliptical; outer lip thickened and slightly denticulated; inner lip enameled, slightly 

 projecting; columella twisted, squamose, only slightly widened; uniisilicus subperforate; canal of 

 medium length, narrow, sometimes covered with overgrowing lips. 



Dimensions. — Long. 35.5 mm.; alt. 21 mm.; body-whorl 26.5 mm.; ajjerture 20 mm.; canal 

 7.5 mm.; defl. 56 degrees. 



Distinguishable from other members of the genus l)y the transverse frills. 

 The type specimen shows tlie original reddish brown color. Pronounced a new 

 species by Dr. Dall. Named in honor of Profcs.sor Josiah Keep of Mills College, 

 who has done so much toward advancing the study of couchology on the Pacific Coast. 



Rare in upper San Pedro series at San Pedro; ty[)e specimen found at Dead- 

 man Island in the upper San Pedro conglomerate. The specimen figured is the 

 type, which is now in the United States National Museum. One sjiecimeii from the 

 upper San Pedro series at the lumber yard, San Pedro. 



Pleistocene. — San Pedro (Arnold). 



262. Ocinebra lurida .Miilili'iulorf. 



Tritoniuni luridum MiDD., Mai. Ross., Pi. il., p. 150, PI. IV., figs. 4, 5, 1849. 



Ocinebra hirida Midd., Cpr., Brit. As.sn. Rept., 1S63. p. 663. Gabij. Pal. Cal., Vol. II., p. 70, ICS69. 

 Trvon, Man. Conch., Vol II . p. 131, PI. XXXIX, figs. 481, 485, 188S. Keep, West 

 Coast Shells, p. 23, fig. 4, 1892. WiLi.iAMSt).^, Proc. U. S. Nat. Mu.s. , Vol. XV, 

 1892, p. 215, PI. XX, fig. 3. 



Shell of medium size, fusiform; whorls six, convex, slightly angulated near posterior margin; 

 upper whorls with several transverse ridges; surface ornamented with numerous rounded, raised 

 lines; suture deeply impressed, distinct; body-whorl not extraordinaril yventricose; aperture sub- 

 ovate; outer lip thickened, denticulated; inner li|) incrusted; columella widened; umbilicus subper- 

 forate; canal narrow, sometimes covered with overgrowing lips. 



Dinunsions. — Long. 25 mm.; lat. 13.3 mm.; defl. 55 degrees. 



