AKNOLD — THE PALEONTOLOGY AND STRATIGKAPHY OF SAN PEDRO. 257 



Distinguishable by lack of transverse I'idges of any kind on body-whorl and 

 its antecedent whorl. Specimen identified by Dr. Dall. 



Rare in upper San Pedro series of San Pedro; one deformed specimen from 

 Crawfish George's. Found in Pleistocene at Pacific Beach, San Diego. 



Living.— Sitka to Santa Barbara (Cooper): San Pedro (U. S. Nat. Mus.). 



Pkistocene. — San Pedro; San Diego (Arnold). 



263. Ocinebra lurida MidcL, var. aspera Baird. 



Plate V, Fig. 12. 



Vilularia aspera Baird, Proc. Zool. Soc, 1863, p. 66. 



Ociiicha lurida v2lx. aspera Baird, Cpr., Brit. Assn. Rept., 1863, p. 663. Tryon, Man. Conch., 

 Vol. II, p. 131, 1880. Cooper, 7th Ann. Rept. Cal. St. Min., 1888, p. 254. 



Shell of medium size, fusiform; whorls six, convex, with about nine prominent, rounded 

 transverse ribs; surface ornamented with numerous rounded, raised, spiral lines and fine incremental 

 lirulas in the interspaces; suture deeply impressed, distinct; body-whorl prominently ventricose, and 

 with transverse, rounded ridges which become obsolete on columella; aperture subovate; outer lip 

 thickened, denticulated; inner lip slightly flattened, incrusted; columella only slightly widened; 

 umbilicus subperforate; canal straight, narrow. 



Dimensions. — Long. 27 mm.; lat. 14 mm.; body-whorl 20 mm.; aperture, including canal, 

 16 mm., canal 6 mm.; defl. 55 degrees. 



Distinguishable from 0. lurida by more ventricose body-whorl, and by the 

 rounded ridges on the lower whorls, which are lacking in lurida. Specimens 

 identified by Dr. Dall. 



Rather common in the upper San Pedro series at San Pedro, Los Cerritos, 

 Crawfish George's and Deadman Island; also found in the lower San Pedro series at 

 Deadman Island and San Pedro. Found in the Pleistocene at bath-house, Santa 

 Barbara; and irrigating ditch, Ventura. The specimen figured is from the upper 

 San Pedro series at San Pedro, and is now in the collection of Delos Arnold. 



Living. — Sitka to Santa Barbara (Cooiaer). 



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



264. Ocinebra lurida Midd., var. cancellina Philippi. 



Platk IX, Fig. 11. 



Fusus cancelliyncs Phil., Archiv. fiir Naturg, Bd. I, 1845, p. 67; Abbild., II, Fusus, PI. Ill, fig. 2. 

 Urosalpinx ca7icellinus Phil., Tryon, Man. Conch., Vol. II, p. 154, PI. XXXIX, fig. 492, 1880. 



Shell small, broadly fusiform; spire elevated, subacute; whorls four, convex; body-whorl 

 ventricose; whorls crossed by about nine prominent, broad, rounded ribs, the interspaces ornamented 

 with prominent rounded, raised spiral lines, between which are numerous squamose incremental 

 lirulae; suture not deeply impressed, rather indistinct, undulating; aperture subelliptical; outer lip 

 slightly twisted, squamose, not widened; canal short, rather broad, uncovered; umbilicus subperforate. 



Ditnensiotis. — Long. 22 mm.; lat. 12.5 mm.; aperture 12.5 mm.; canal 4 mm. ; defl. 62 degrees. 



( 33 ) March 26, 1903. 



