BIBLIOGRAPHIC LIST OF GENERA AND SPECIES. 1079 



Ptychoparia o went Continued. 



Arionellus? Oweni Meek and Hayden, Amer. Jour. Sci. Arts, (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, 1867, 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, figa. 



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

 Cambrian and ?0rdovician (Pogonip): Wyoming; Dakota; Eureka District, 



Nevada. 



PTYCHOPARIA SARATOGENSIS Walcott. See Plethopeltis saratogensis. 



Ptychoparia unisulcata (Hall and Whitfield). 



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



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



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

 Cambrian and ?0rdovician (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, 1863, 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 Chonophyllum canadense. 



