982 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



PACHYOCRINUS. Billings. Genotype: P. crassibasalis Billings. 



Pachyocrinus Billings, Geol. Surv. Canada, dec. 4, 1859, p. 22. — Wachsmuth and 



Springer, Proc. Acad. Nat. Sci. Philadelphia, 1879, p. 319 (Rev. Pal., pt. 1, 



p. 145).— Miller, N. A. Geol. Pal., 1889, p. 265.— Bather, Treatise on Zool., 



pt. 3, Echinoderma, London, 1900, p. 203. 



Pachyocrinus crassibasalis Billings. 



Pachyocrinus crassibasalis Billings, Geol. Surv. Canada, dec. 4, 1859, p. 22, pi. 1, 



figs. 3a, b.— Hudson, Bull. New York State Mus., 107, 1907, p. 120, fig. 4, pi, 

 Chazyan (Aylmer): Caughnawaga, and Islands of Montreal, Jesus, and Bizard, 



Canada. 



Pachypora (Platyaxum) Foerste. See Platyaxuin. 



Pachystroma Nicholson and Murie. See Stromatopora Goldfuss. 



PAGODIA Walcott. Genotype: P. lotos Walcott. 



Pagodia Walcott, Proc. U. S. Nat. Mus., 29, 1905, p. 63; Cambrian Faunas of 

 China, 3, Carnegie Inst., 1913, p. 160. 



Pagodia seelyi Walcott. 



Pagodia seelyi Walcott, Smiths. Misc. Coll., 57, 1912, p. 269, pi. 44, figs. 12-14a. 

 Ozarkian or Upper Cambrian (Potsdam): Near Port Henry, Essex County, New 



York. 

 Cotypes.— Gat, Nos. 58582-58584, U.S.N.M. 



PAL^ACMiEA Hall and Whitfield. Genotype: P. typica Hall and Whitfield. 



Palseacma?a Hall and Whitfield, 23d Rep. New York Mus. Nat. Hist., 1873, p. 242 

 (extract, 1872, p. 21).— Lindstrom, Kongl. Sven. Vet. Akad. Handl., 19, No. 

 6, 1881, p. 58.— Barrois, Mem. Soc. Geol. du Nord., 3, Lille, 1889, p. 184; Mem. 

 Soc. Agriculture et Arts de Lille, 4th ser., 17, p. 184.— Miller, N. A. Geol. 

 Pal., 1889, p. 414.— Barrois, Ann. Soc. Geol. du Nord, 19, Lille, 1891, p. 213.— 

 Koken, Die Leitfossilien, Leipzig, 1896, p. 96. — Ulrich and Scofield, Geol. 

 Minnesota, 3, pt. 2, 1897, pp. 826-836.— Berkey, Amer. Geol., 11, p. 278.— 

 Koken, Bull, de l'Acad. Imp. Sci. St. Petersburg, 7, 1897, p. 113.— Grabau 

 and Shimer, N. A. Index Fossils, 1, 1909, p. 606. 



Palseacmsea humilis Ulrich and Scofield. 



Palseacmaea humilis Ulrich and Scofield, Geol. Minnesota, 3, pt. 2, 1897, p. 837, 

 pi. 61, figs. 45-48.— Grabau and Shimer, N. A. Index Fossils, 1, 1909, p. 607, 

 fig. 809a-b. 



Black River: Minneapolis (Platteville) and Goodhue County (Decorah), Minne- 

 sota. 



Palaeacmsea irregularis Raymond. 



Palaeacmaea irregularis Raymond, Amer. Jour. Sci., 4th ser., 20, 1905, p. 376; 



Ann. Carnegie Mus., 4, 1908, p. 174, pi. 54, figs. 10-12. 

 Chazyan (Day Point): Chazy, New York. 



Palseacniaea orphyne (Billings). 



Metoptoma Orphyne Billings, Pal. Fossils, 1, Geol. Surv. Canada, 1865, p. 88 



(adv. sheets, 1862). 

 Palaeacmsea orphyne Ulrich and Scofield, Geol. Minnesota, 3, pt. 2, 1897, p. 836 



(gen. ref.). 

 Ozarkian? (Levis — erratics): Point Levis, Quebec. 



Palaeacmaea quebecensis (Billings). 



Metoptoma Quebecensis Billings, Pal. Foss., 1, Geol. Surv. Canada, 1865, p. 308, 

 fig. 300. 



