512 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



1394. Placenticeras ? vancouverensis (Meek). Holotype. 



Nanaimo (Cret. ). Komooks, Vancouver Island. 



Meek, Bull. U. S. Geol. and Geogr. Surv. Terr., II, 1876, p. 370, 

 pi. 6, figs. ia-c. 



See Ammonites vancouverensis. 



18936. Placenticeras whitfieldi Hyatt. Cotype. 



Montana (Upper Cret.). Upper Missouri. 



Hyatt, Mon. XLIV, U. S. Geol. Surv., 1903, pp. 221-232, pi. 47, 

 figs. 1, 2. 



41364. Placentula marginata Ulrich. Holotype. 



Lorraine (Ord.). Cincinnati, Ohio. 



Ulrich, Journ. Cincinnati Soc. Nat. Hist., XIII, 1890, p. 124, pi. 

 10, figs. I3a-c. 



1 15422. Placocythus barretti Duncan. Cotypes. 



Miocene. Jamaica, West Indies. 



Duncan, Quart. Journ. Geol. Soc. London, XIX, 1863, p. 437, pi. 

 16, fig. 1. 



1 15425. Placocythus morei Duncan. Plesiotype. 



Miocene. Jamaica, British West Indies. 



Guppy, Quart. Journ. Geol. Soc. London, XXI, 1865, 1866, p. 10, 

 pi. 2, fig. 1. 



1 15423. Placotrochus alveolus Duncan. Holotype. 



Miocene. Jamaica, West Indies. 



Duncan, Quart. Journ. Geol. Soc. London, XIX, 1863, p. 438, pi. 

 16, fig. 2. 



135778. Placunanomia lithobleta Dall. Cotypes. 



Oligocene. Bowden, Jamaica. 



Dall, Trans. Wagner Free Inst. Sci. Phila., Ill, Pt. IV, 1898, 

 p. 778. 



8082. Placunopsis hilliardensis White. Cotypes. 



Colorado? (Cret.). Hilliard Station, Wyoming. 



White, Eleventh Ann. Rept. U. S. Geol. Surv. Terrs., 1879, 

 p. 278, pi. 7, fig. 14a. — Stanton Bull. No. 106, U. S. Geol. 

 Surv., 1893, p. 68, pi. 8, fig. 11. 



1 15370. Plagionotus loveni Cotteau. Holotype. 



Eocene. St. Bartholomew, West Indies. 



Cotteau, Kongl. Svenska Vet-Akad. Hand., XIII, 6, 1874, p. 41, 

 pi. 8, figs. 7, 8. 



1 15492. Planaxis crassilabrum Guppy. Holotype. 



Pliocene. Trinidad, British West Indies. 



Guppy, Geol. Mag., London, Dec. II, I, 1S74, p. 411, pi. 18, fig. 13. 



18360. Planolites annularis Walcott. Holotype. 



Dower Cambrian. Near North Greenwich, Washington 

 County, New York. 



Walcott, Proc. U. S. Nat. Mus., XII, 1889, p. 34; Tenth Ann. 

 Rept. U. S. Geol. Surv., 1890, p. 602, pi. 60, fig. 5. 



