ARNOLD — THE PALEONTOLOGY AND STRATIGRAPHY OF SAN PEDRO. 199 



Family LI. CONID.E. 



Geuus Conus Linne. 



Shell thick, obconic, whorls enrolled upon themselves, the spire short, or not elevated, 

 smooth or tuberculated; aperture long, narrow, the margins parallel, truncated at the base; the outer 

 lip with a slight sutural sinus. 



Conus nuirniorens Linn, is a characteristic species. 



162. Conus californicus Hinds. 



Conus californicus Hus., Proc. Zool. Soc, 1844; Voy. Sulphur, p. 7, PI. I, figs. 3, 4, 5, 1844. 

 = C. ravus Gld. {fide Cpr., Brit. Assn. Rept., 1863, p. 65S). Gabb, Pal. Cal., 

 Vol. II, p. 78, 1869. Tryon, Man. Conch., Vol. VI, p 17, PI. IV, figs. 62, 63, 1884. 

 Cooper, 7th Ann. Rept. Cal. St. JNIin., 1888, p. 236. Keep, West Coast Shells, 

 p. 54, 1892. 



Shell double-conical; spire compact, elevated; apex subacute; whorls seven or eight, flat, 

 smooth, except for incremental lines; suture irregular, appressed; body-whorl conical, subangular 

 anteriorly, spirally ornamented with fine lines, which are most prominent on lower part of whorl; 

 aperture long, narrow, slightly wider anteriorly; outer lip thin, bulging anteriorly; obsolete pos- 

 terior sinus. 



DimeJisions. — Long. 34 mm.; lat. iS mm.; body-whorl 29 mm.; aperture 27.5 mm.; defl. 

 83 degrees. 



The specimens from the Pleistocene are generally much worn, but some of 

 them retain the reddish brown coloration of the spiral lines and upper part of 

 the whorls. 



Not uncommon in the Pliocene at Deadman Island and Timm's Point; in the 

 lower San Pedro series at Deadman Island and San Pedro; very common in the 

 upper San Pedro series at Deadman Island, Crawfish George's, Los Cerritos, San 

 Pedro, and Long Beach. Found also at Spanish Bight and Pacific Beach, San Diego. 



Living. — Farallon Islands to San Diego; Lower California (Cooper). 



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

 (Arnold). 



Pliocene. — San Fernando (Cooper): San Pedro; Stanford University (Arnold). 



Family Lll. PLEUROTOMID.E. 



Genus Pleurotoma Lamarck. 



vShell turriculated, fijsiform, terminated anteriorly by a straight, more or less long canal; 

 aperture oval; columellar lip smooth, straight or sinuous; outer lip somewhat sinuous, with a pos- 

 terior sinus. 



Pleurotoma hahijlonia Lara, is a characteristic species. 



