932 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 Platyaxum. 

 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 seelyl 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.G&t. Nos. 58582-58584, U.S.N.M. 



Hall and Whitfield. Genotype: P. typica Hall and Whitfield. 



Palseacmsea 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. duNord., 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 1'Acad. Imp. Sci. St. Petersburg, 7, 1897, p. 113. Grabau 

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



Palaeacmeea humllis Ulrich and Scofield. 



Palseacmsea 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. 



Palaeacmaea Irregularis Raymond. 



Palseacmsea 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. 



Palaeacmaea orphyne (Billings). 



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



(adv. sheets, 1862). 

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



(gen. ref.). 

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



Palseacmaea quebecensls (Billings). 



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

 fig. 300. 



