AKNOLD — THE PALEONTOLOGY AND STKATIGKAPHY OF SAN PEDKO. 209 



1 80. Drillia torosa Curpenler. 



Ihillia torosa Ci'r., Biit. Assn. Rept., 1863, p. 657; Jour, de Conch., 3id Ser., Vol. XV, 1H65, p. 145. 

 Tryon, Man. Conch., Vol. VI, p. 183, PI. XIV. fig. 93, 1884. Cooper, 7th Ann. Rept. 

 Cal. St. Min., 18SS, p. 239. Kekp, West Coast Shells, p. 56, fig. 59, 1892. William- 

 son, Proc. U. S. Nat. Mus., Vol. XV, 1892, p. 298. 



Shell elongated; s|)ire elevated; ape.x acute; whorls eight, angulated near middle, with row 

 of about nine nodes, transversely elongated, on angle; the upper portion of whorl Hat to concave; 

 anterior half of whorl spirally striated; incremental lines visible, oblique, and on upper part of whorl, 

 concave anteriorly; suture inijiressed, distinct; lower portion of body-whorl and columella spirally 

 striateti; aperture elliptical; outer lij) thin and arcuate anteriorly; inner !![) and columella slightly 

 incrusted; jiosterior sinus shallow; anterior sinus short, straight. 



Ditncnsions. — Long. 25 mm.; lat. 8 mm.; body-whorl 14.5 mm.; ajibrture, including 

 canal 9.5 mm.; defi. 22 degrees. 



Distinguishable by the nodose whorls. The relative length of canal varies 

 somewhat in this species, as does also the prominence of the nodes. 



Found in the Pliocene at Deadman I.sland and Timm's Point; in the lower 

 San Pedro series at Deadman Island and San Pedro; and in the upper San Pedro 

 series at Deadman Island, San Pedro, Los Cerritos, and Crawfish George's. Most 

 common ia the lower formations. 



Living. — Santa Cruz to Santa Barbara (Cooper): San Pedro (Williamson). 



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



Pliocene. — San Pedro (Arnold). * 



Genus Bela Gray. 



Shell oval, fusiform, thin; spire produced; canal short; sinus small, near the suture; columella 

 llattcntil; operculum pointed at both ends. 



Pleiirotoma turricula Montf. is a characteristic species. 



181. Bela fidicula Gould. 



Platk VII, l''i(i. 10. 



Fiesi/s ^di'cu/a Gld., Proc. Bost. Soc. Nat. Hist., Vol. Ill, 1849, p. 142; Wilkes' E.xpl. E.xped., 



Vol. XII, p. 233, fig. 284, 1852. 

 Bc/a Jidtcula Gld. , Cpr., Brit. Aesn. Rept., 1863, p. 658. Trvon, Man. Conch., Vol. VI, p. 222, 



PI. XXXII, fig. 17, 1884. 



Shell small, thin, turrcted, short, fusiform; whorls seven, angular, forming a broad shoulder at 

 the suture; surface sculptured with delicate, regular, obtuse, transverse rib-folds, about twenty-four 

 on the last whorl, on the middle of which they disappear, decussated by more crowded, delicate 

 i^rooves, a little undulating, about eight on the penultimate whorl; suture dee|)ly impressed, distinct; 

 aperture narrow, elliptical; outer lip thin, slightly arcuate; i)illar smooth interiorly, spirally striate 

 externally; canal short. 



Dimensions. — Long. 10 mm.; lat. 4.1 mm.; body-whorl 6.8 mm.; aperture 5 mm.; defl. 

 30 degrees. 



Found in Pliocene at Deadman Island, lower San Pedro series at Deadman 

 Island, and upper San Pedro series at Crawfish George's. Found also in the Pleistocene 



( 2- ) March 14, 190a. 



