58 BULLETIN NO. 30, UNITED STATES NATIONAL MUSEUM. 



I'iige. 



B.?l arenariuni, n.8.,M. &, "\V.,]8fi8, pi. ix, fig8.2a, fc 409-410 



Zaphrentis, 11. &.C.,i820 410 



Zaphrentis, sp. undt., pi. ix, tif;.. 3 a, fc 410 



MoUusca 410 



Brachiopoda 410 



Orthis, Dalman, 1828 410 



Orthis. uiidt.. pi. ix. fljr. 4 410-411 



Stroplwmena, Kat'., 1820 411 



S. iStrvphodonta), sp. ? pi. ix, figH. 9 (and7a?) 411--112 



S. {Strophodonta), sp , pi. vi, figs. 6a, b 412 



Prodtictus, Sowerby, 1814 412 



P. exajithematus, Hall P. 1857, pi. x, figs. 3 a-c 412-413 



Spirifer, Sowerby, 1815 414 



Subgenus Trigonotreta, KcKnig, 1825 414 



S. perextetuus. n. s., M. &, W., 1868, pi. x, figs. 1 a^d 414-415 



S. paradoxus, Schlot. ?? sp., 1813, pi. x, fig. 2 415-416 



Articulata 416 



Crustacea. 416 



Dalma7ii1es. Anct v 416 



Subgenus Odontocephalus, Conrad, 1840 416 



Odontocephalus ? pi. ix, fig. 10 416-417 



Dalmanites { Odontocephalus) cegeria, Hall 1 sp., 1861, pi. x, figs. 4 a~c 417-418 



FOSSILS OF THE HAMILTON GROUP. 



Protozoa 419 



Spongice 419 



Astrceospongia, Roemer, 1854 419 



A. hamiltoneiists, M. <t W., 1866, pi. x, fig. 6 419 



Jiadiata 420 



Zouphyta 420 



2licrocyclus* n.g., M. & W., 1866 420 



Jf. discus, n. s., M. feW., 1868, pi. xi, figs. 7 o, 6 420-421 



Echinodennata 421 



Taxocrinus. Phillips, 1843 421 



r. gracilU, M. & W., 1865, page 421, flg. — , and pi. xiii, fig. 3 421-423 



ilolhisca 423 



Brachiopoda 423 



Orr/ii*, Dalman, 1827 , 423 



O. mcfarlani. Meek, 18G8, pi. xiii, figs. lOa-d 423-424 



O. iotuenis var. furnarius. Hall, pi. xiii, figs. 9 a, 6 4:;4-425 



atruphomena, Raf ,1820 426 



S. rhomboidalis. Walileuib., sp., 1821, pi. x, fig. 7 a, 6 426-427 



TropidUeptus, Hall, 1857 427 



T. carinatus, Conrad, sp., 1839, pi. xiii, figs. 2 a-c 427-428 



Pentamerus, Sowerby. 1813 428 



P. cuinis, Owen .' sp., 185.5, pi. xiii, figs. 6 a-c 428-429 



P. sii.bglobosiis, n. s., M. &. W., 1868, pi. xiii, figs. 5 a-c 429-430 



J.tn/j)a, Dalinaii, 1827 430 



A. aspera. Sclilotbeini, sp., 1813, pi. xiii, figs. 7 o-d. 439-431 



A. reticularis, Linnajus, sp., 1767, pi. xiii, fig. 11 432-433 



Spirifer, Sowerby. 1815 433 



Subgenus Trigonotreta. Kcenig, 1825 433 



S. fornaculn. Hall. 1857. pi. xiii, fii's. 8a-c 433-434 



S. subundifervs, n. s., M. & W., 1868, pi. x, flg. 5 o-e 434-4.35 



Ci/Wi?ia, Davidson, IS.W .. 436 



O. triquetra. Hall, sj) . 18.58, pi. xiii, flg. 4 a-d 436 



Linijula. Rruguierc, 1792 437 



L. siibspatulata, u. s.. M. & AV., Ia68, pi. xiii, flg. 1 437 



Lamellibraiichiata 437 



Plerineu, Goldf., 1832 437 



P. ? subpapyracea, M. & W., 18C6, pi. xi. flg. 5 437-438 



2Iodiol(ips>s, Hall. 1847 438 



M.t perorata, M. & W., 186.5, pi. xi, flg. 2 438-439 



• niKptn, small ; x^X^"*! * circle. 



