WRITINGS OF D. D OWEN AND B F. SHUMARD, 251 



8. 



Owen, D. D., and Shumard, B. F. Descriptions of one New Genus and twenty-two 

 New Species of Crinoidea, from tlie subcarboniferous limestone of Iowa. <^ Rep. 

 Geol. Surv. of Wisconsin, Iowa, and Minnesota, and incidentally of a part of 

 Nebraska territory, by David Dale Owen. Appendix. Article II, pp. 587-598, 



pis. Va-Yb. Philadelphia, 1852. 



Page. 



Platycriniis, Miller 587 



P. planus, Owen & Shumard, 1850, tab. v A, figs. 4 a-c 587 



P. yandellii, Owen & Shumard, 1850, tab. v A, figs. 6 a, b 587-588 



P. discoideus, Owen & Shumard. 1800, tab. v A, figs. 1 a, b 588 



P. corrugatus, Oweu & Shumard, 1850, tab. v A, figs. 2 a-e 589 



P. burlingtonensis, Owen & Shumard, 1850, tab. v A, fig. 5 589 



IHchocrinus, Munster 589-590 



D. ovah(s, Owen & Shumard, 1850, tab. v A, flgs. 9 a, 6 590 



D. striatus, Owen & Shumard, 1850, tab. v A, fig8. \0 a,b 590 



Cyathocrmns, Miller 591 



C. iowensis, Owen & Shumard, 1850, tab. v A, figs. 11 a-c 591 



0. r.ornutus, Owen &. Shumard, 1850, tab. v A, flgs. 8 a,h 591 



Pentremites, Say 591 



P. noriooodii, Owen &. Shumard, 1850, tab. v A, figs. 13 a-e 591-592 



P. melo, Owen <t Shumard, 1850, tab. v A, figs. 14 a-c 592 



P. laterni/ormis, Owen & Shumard. 1850, tab. v A, fig. 15 592-593 



P. stelliformis, Owen iz. Shumard, 1850, tab. v A, figs. 16 a, 6 593 



Actinocrinui unicornits, Owen &. Shumard, 1850, tab. v A,flgs.l2a,6 593-594 



Megistocrinus, u. g., Owen & Shumard, 1852 594 



J/, evansii. n. s., Owen &. Shumard, 1852, tab. v A, figs. 3 a,b 594 



Platycrinus, Miller 594 



P. americanvs. Owen & Shumard. 1852, tab. v B, flgs. 1 a, 6 594-595 



Poteriocrimis, Miller 595 



P. rhombiferus, Owen &. Shumard, 1852, tab. v B, flgs. 2 a-c 595 



P. tumidus, Owen & Shumard. 1852, tab. v B, flgs. 3 a, 6 595-596 



P. spinosus, Owen & Shumard. 1 852, tab. v B, fig. 4 596 



P. occidentalis, Owen & Shumard, 1852, tab. vB, figs. 5 a, b 596-597 



Agagsizocrinus (Troost in MSS) 597 



A. conicus, Owen & Shumard, 1852, tab. v B, fig. 6 597 



Synbathocrimis dentatm, Owen & Shumard, 1852, tab. v B, flgs. 7 a,b 597-598 



Owen, D. D. Shumard, B. F. Summary of the distribution of Orders, Genera, and 

 Species, in the Northwest. <^Rep. Geol. Surv. of Wisconsin, Iowa, and Minnesota, 

 and incidentally of a part of Nebraska Territory, by David Dale Owen. Appen- 

 dix. Article III, pp. 598-600. Philadelphia, 1852. 



Modified by additions and researches since the publication in the Proo. of the American As- 

 sociation, 1851. 



