Geological Papers. 225 



semilunar; inner lip callous and reflected completely over the um- 

 bilicus; outer lip sharp. 



A numerous species in the Pliocene of the Quillayute formation 

 at the old mouth of Maxfield creek near Quillayute, Wash.; also on 

 the Bogachiel river in the northeast bank near Mr. Earl Wilson's 

 place, between Forks and Quillayute. 



Living: North Atlantic, Arctic Ocean, Alaska (Cooper). 



Pleistocene: San Pedro, Santa Barbara, Cal. (Arnold); San 

 Diego to Santa Barbara (Cooper); Fish Point, Lummi peninsula, 

 Whatcom county, Washington (Reagan). 



Pliocene: Santa Barbara, San Pedro, Cal.; mouth of Quinaielt 

 river near Granville, Wash. (Arnold); Quillayute, Wash. (Reagan). 

 64. Polynices (Lunatia) lewisii Gould. Plate VI, fig. 64; times, one-half. 



Natica lewisii Gld., Proc. Bost. Soc. Nat. Hist., 1847, p. 239: Wilkes's 

 Expl. Exped., 211, pi. XV, p. 253, 1852. 



Lunatia lewisii Gld., Cpr., Brit. Assn. Rept., 1863, p. 661. Gabb, Pal. Cal, 

 vol. II, p. 77, 1869; equals N. reiniana Dunker and N. algida Gld (See 

 Tyron, Man. Conch., vol. VIII. p. 35, pi. XIII, figs. 11, 12; pi. IX fig 

 70, 1886.) Cooper, 7th Ann. Rept. Cal. St. Min., 1888, p. 247. Keep 

 West Coast Shells, p. 45, fig. 25, 1892. Ball, Trans. Wagner Inst. Sci ' 

 vol. Ill, part II, 1892, p. 374. 



Natica (Lunatia) lewisii Gld., Williamson, Proc. U. S. Nat. Mus., vol XV 

 1892, p. 211.64 



Polynices (Lunatia) lewisii Gould, Arnold, Mem. Cal. Acad. Sci., vol III 

 pp. 315, 316, pi. X, fig. 14. ' ■' 



Shell very large, globose, conic; spire elevated, acute; whorls four 

 to six, slightly convex, well rounded; body whorl large, having a 

 long, slightly convex slope from suture to near the base, where it 

 suddenly turns under the umbilicus; aperture ovate, broad, having 

 a sharp lip on right margin; on the left margin the lip widens and 

 presents a rounded edge; umbilicus moderately long, deep, nearly 

 round; operculum thin, horny; upper whorls more concave than 

 body whorl; whorls separated from each other by suture. 



Dimensions: Adult specimens range from 70 to 100 mm. or 

 more in axial diameter, and 60 to 80 mm. in transverse diameter. 

 Some specimens are still larger. 



Living: Discovery Harbor, Oregon, Puget Sound (Pickering)- 

 Quillayute Bay, Neah Bay, Washington (Reagan); Strait of Fuca 

 to San Diego (Cooper); Japan (Tryon); Catalina Island (Arnold). 



Pleistocene: San Pedro, Cal. (Arnold); San Nicolas Island 

 Santa Barbara, Cal. (Cooper) . 



Pliocene: Santa Barbara, Kirker's Pass, San Fernando, Cal. 

 (Cooper) ; Soquel, Santa Cruz county, California (Arnold) ; Quil- 

 layute, Wash. (Reagan). 



64. After Arnold, loc. cit. 



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