CLASS GASTROPODA 
151 
whorl; surface closely clathrate, except on the lower part of the last 
whorl where the radiating lines become obsolete; aperture large, colum¬ 
ella somewhat twisted, slightly encrusted; outer lip thin, acute, posterior 
sinus moderately deep and narrow, adjoining the suture and angular at 
its upper corner; color, brownish-white with minute brown spots sparsely 
scattered, usually placed on the larger of the revolving ribs. (Gabb.) 
Type in Survey Cabinet, Mollusca, No. 1053. Type locality, Santa 
Catalina Island in 60 fathoms. (Dr. Cooper.) 
Range. San Miguel Island to San Diego and Cortez Bank, California. 
Genus TARANIS Jeffreys, 1870 
Shell minute, cancellated; whorls angulated; slightly exserted at base; 
aperture pyriform; outer lip thin, simple; sinus obsolete; canal short. 
(Arnold.) 
Type. Taranis morchi Malm. 
Distribution. Alaska to San Diego, California. Fossil: Pleistocene, 
San Pedro, California. 
Taranis strongi Arnold, 1903 
Paleontology of San Pedro, California, 215; PI. 9, fig. 7. 
Shell small, elongated; spire elevated; apex mammilliform; whorls 
six, angulated near middle, upper surface concave, lower surface convex; 
two strong spiral ridges, one on angle, the other in middle of lower por¬ 
tion of whorl; incremental lines visible; suture impressed, distinct; aper¬ 
ture subovate, oblique; outer lip thin, slightly arcuate anteriorly; inner 
lip smooth; posterior sinus broad, very shallow; anterior sinus short; 
columella short and distinct. Long., 12; lat., 5.5 ; body-whorl, 7; aperture, 
5 mm. (Arnold.) 
Type in United States National Museum. Type locality, Lower San 
Pedro series, Deadman Island. 
Range. Forrester Island, Alaska, to San Diego, California. (Re¬ 
cent.) Fossil: Pleistocene, San Pedro, California. 
Fossil: Pleistocene, San Pedro, California. 
Family CANCELLARIIDAE 
Genus CANCELLARIA Lamarck, 1799 
Shell cancellated; aperture channeled in front; columella with several 
strong oblique folds; no operculum. The animals are vegetable feeders. 
Type. Cancellaria reticulata Linnaeus. 
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