BIBLIOGRAPHIC LIST OF GENERA AND SPECIES. 1079 



Ptychoparia oweni — Continued. 



Arionellus? Oweni Meek and Hayden, Amer. Jour. Sci. Arte, (2), 33, 1862, p. 74, 



fig. 4. 

 Conocephalites oweni Hall, 16th Rep. New York State Cab. Nat. Hist., 1863, p. 



155, pi. 8, figs. 17, 20; Trans. Albany Inst., 5, 18G7, p. 141, pi. 3, figs. 17, 20. 

 Conaspis oweni Hall, 16th Rep. New York State Cab. Nat. Hist., 1863, p. 152. 

 Agraulos Oweni Meek and Hayden, Pal. Up. Missouri, Smithsonian Cont. Knowl., 



14, No. 172, 1865, p. 9, text figs. A-C. 

 Conocoryphe (Ptychoparia) Gallatinensis Meek, 6th Ann. Rep. U. S. Geol. Surv. 



Terr., 1873, p. 485. 

 Crepicephalus (Loganellus) centralis "Whitfield, Prel. Rep. Pal. Black Hills, 



U. S. Geog. and Geol. Surv., 1877, p. 10. 

 Crepicephalus centralis Whitfield, Rep. Geol. Res. Black Hills, Dakota, Powell's 



U. S. Geol. Surv., 1880, p. 341, pi. 2, figs. 21-24. 

 Ptychoparia Oweni Walcott, Mon. U. S. Geol. Surv., 8, 1884, p. 55, pi. 10, figs. 



3, 3a.— Grabau and Shimer, N. A. Index Fossils, 2, 1910, p. 277. 

 Cambrian and ?Ordovician (Pogonip): Wyoming; Dakota; Eureka District, 



Nevada. 



Ptychoparia saratogensis Walcott. See Plethopeltis saratogenais. 



Ptychoparia unisulcata (Hall and Whitfield). 



Crepicephalus (Loganellus) unisulcatus Hall and Whitfield, U. S. Geol. Expl. 



40th Pari., 4, 1877, p. 216, pi. 2, figs. 22, 23. 

 Ptychoparia unisulcatus Walcott, Mon. U. S. Geol. Surv., 8, 1884, p. 58. 

 Cambrian and ?Ordovician (Pogonip): Eureka District, Nevada. 



Ptychoparia zenkeri (Billings). 



Conocephalites Zenkeri Billings, Canadian Nat. Geol., 5, 1860, p. 305, fig. 4; 



p. 422; Amer. Jour. Sci., 2d ser., 30, 1860, p. 243; Proc. Acad. Assoc. Adv. 



Sci., 14, 1861, p. 163; Geol. Canada, Geol. Surv. Canada, 18G3, p. 233, fig. 



253.— Chapman, Expos. Min. Geol. Canada, 1864, p. 140, fig. 150; p. 164, 



fig. 161.— Billings, Pal. Foss., 1, Geol. Surv. Canada, 1865, p. 398, fig. 375. 

 Ptychoparia zenkeri Miller, N. A. Geol. Pal., 1889, p. 565, fig. 1052. 

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



PTYCHOPHYLLUM Lonsdale. Genotype: P. stokesi Edwards and Haime. 



Ptychophyllum Lonsdale, Sil. System, 1839, p. 691. — Edwards and Haime, Mon. 

 d. Polyp. Foss. d. Terr. Pal., 1851 (Arch, du Mus. d'Hist. Nat., 5), pp. 169, 

 406.— Pictet, Traite de Pal., 2d ed., 4, 1857, p. 457.— Milne-Edwards, Hist. 

 Nat. Corall., 3, 1860, p. 399.— Dybowski, Archiv. f. Natur. Liv-, Ehst- und 

 Kurl., 5, 1873, pp. 336, 398.— Salter, Cat. Camb. Sil. Foss., 1873, p. 113.— 

 Zittel, Handb. Pal., 1, 1879, p. 229.— Roemer, Leth. geog., pt. 1, Leth. Pal. 

 1883, p. 358.— Miller, N. A. Geol. Pal., 1889, p. 201.— Sherzer, Amer. Geol., 

 7, 1891, pp. 284-289; Bull. Geol. Soc. Amer., 3, 1892, p. 278.— Nicholson, 

 Rec. Geol. Surv. N. S. Wales, 4, 1894, p. 16.— Koken, Die Leitfossilien, 

 Leipzig, 1896, p. 308.— Zittel-Eastman Textb. Pal., 1, 1900, p. 78; 2d ed. 

 1913, p. 85.— Grabau and Shimer, N. A. Index Fossils, 1, 1906, p. 62. 



Ptychophyllum benedict! Greene. 



Ptychophyllum benedicti Greene, Cont. Indiana Pal., pt. 4, 1900, p. 28, pi. 12, 



figs. 4-6. 

 Niagaran (Louisville): Bear Grass Creek quarries, near Louisville, Kentucky. 



Ptychophyllum canadense Billings. See Chonoi^hyllum canadense. 



