ARNOLD— THE PALEONTULOfJY AND STKATKiKAPHY OF SAN PEDUO. 255 



Itaic ill llic lower 8;m Pedro scries ;it S;iii Petlro :iiiil Deiidnian Isljiiid. 

 KountI ;il.-o ill llie Pleistocene ;il S;iiita iJarbaia. 'I'lie specimen figured i.s from 

 tlie lower San Pedro series at Deadraan Island, and is now in the collection of 

 Delos Arnold. 



Living. — Catalina Island; Santa Barbara Cliannel (Cooper). 



Pleistocene. — Santa Barbara (fJabh; Arnold): S:iii Pedro (Arnold). 



259. Ocinebra foveolata lliml^. 



Afiire.x foveola/a Hds., Proc. Zool. Soc, 1843, p. 127; Voyage Sulphur, p. 9, No. 13, PI. III. fij:s. 

 15,16, 1844. Cpk., Brit. Assn. Rept., 1856, p. 205. Tryon, Man. Conch., Vol. II, 



p. 125, PI. XXXVI n. fig. 465, 18S0. 



Muricidea foveolata Hds., CooFiiK, ytli Ann. Rept. Cal. St. Min., 1888, p. 252. 

 Ocinebra foveolata Hds., Williamson, Proc. U. S. Nat. Mus., Vol. XV, 1892, p. 215. 



Shell of medium size, fusiform; spire elevated; whorls si.\, angulated, with six or seven 

 prominent, rounded, transverse ribs tiiat rise to the prominence of nodes on the angle of the whorl: 

 surf.icc ornamented with numerous clear-cut, rather squarish, raised lines, and incremental lirujje in 

 the interspaces; suture deeply appressed, wavy: aperture subpyriform; outer lip thickened, denticu- 

 l.iled; inner lip incrusted, smooth; canal long, narrow, slightly curved; columella not perceptibly 

 witiene(.l; umbilicus subperforate. 



Dimensions. — Long. 35 mm.; lat. 17 mm.; body-whorl 28 mm.; aperture, including canal, 

 30 mm.; canal 9 mm.; defl. 60 degrees. 



Distinguishable b\' the broad, prominent, transverse ridges which rise to 

 rounded nodes rather than to sharp points, as in some other members of the genus, 

 and by the deep suture and rather long, narrow form of the shell. Specimen identi- 

 fied Ity Dr. Dull. Specimens of 0. jierita in the State Museum collection of fossils at 

 Berkeley are labeled "'0. foceolnta." 



Rare in upper San Pedro series of San Pedro; one imperfect specimen found. 



Living. — Bauliiia^ Bay to Lower California (Cooper). 



Pleistocene. — Santa Barbara; San Pedro (Cooper): San Pedro (Arnold). 



260. Ocinebra interfossa Carpenter. 



Ocinebra interfossa QvK. , Brit. Assn. Rept, 1863, p. 663. Gabb, Pal. Cal., Vol. II, p. 70, 1869. 

 Trvon, Man. Conch., Vol. II, p. 131, PI. XXXIX, fig. 484, 1880. Cooper, 7th Ann. 

 Rept. Cal. St. Min., 1888, p. 254. Keep, West Coast Shells, p. 24, fig. 5, 1892. 

 Williamson, Proc. U. S. Nat. Mus., Vol. XV, 1S92, p. 215. 



Shell small, broadly fusiform; spire elevated, subacute; whorls five or si.x, angulated above; 

 surface sculptured with numerous transverse and spiral ridges of nearly equal prominence, giving the 

 surface a latticed appearance; suture deeply impressed, distinct; aperture subovate; outer lip 

 thickened, slightly denticulated; inner lip smooth, incrusted; canal short, generally covered; 

 columella twisted, squamose; umbilicus subperforate. 



Dimensiotis. — Long. 13 mm.; lat. 7.2 mm.; body-whorl 10 mm.; aperture, including canal, 

 7 5 mm.; canal 2.5 mm.; defl. 55 degrees. 



Distinguishable from other members of genus by .strong, latticed sculpture, 

 short canal and small size. Identified by Dr. Dall. 



