84 BULLETIN NO. 30, UNITED STATES NATIONAL MUSEUM. 



Page. 

 MoUusca. 



Gasteropoda. 



Plati/ceras, Conrad 516 



P. uncum, M. & W., 18G6, pi. xvii, fig. T 516-517 



P. injundihulum, M. & W., 1866, pi. xvii, fig. 3 517-518 



P. eguilatera, Hall, 1860, pi. xvii, fig. 2 518-519 



P.fissurcUa, Hall, 1859, pi. xvii, fig.4 519-520 



Pteropoda. 



Oonularia. 



Conularia subcarbonaria, M. icW., 1865, pi. xix, fig. 4 520-522 



Cephalopoda. 



Nautilus, Linn 522 



iV. (Discites) disciformis, M. & W., 1865, pi. xviii, fig. 1 522-523 



K. (Temnocheilus) niotensis, M. & W., 1865, pi. xix, fig. 3 523-524 



N. (Solenocheilus) leidyi, M. & W. , 1865, pi. xviii, fig. 2 524-525 



Articulata. 



PhilKpsia, Portlock 525 



P. ( Griffithides) portlockii, M. & "W. , 1865, pi. xix, fig. 6 525-528 



P. (Griffithides) bvfo, M. & W., 1870, pi. xv, fig. 10 52&-529 



FOSSILS OF THE SAINT LOUIS GROUP. 



Echinodermata. 



Barycrinus 530 



B. spectabilis, M. & "W., 1869, pi. xx, fig. 8 530-533 



Poteriocrinites 533 



P. hardinensis, 'Worthen MSS., pi. xx, fig. 10 533 



Subgenus Scaphioerinus 534 



P. (Scaphioerinus) huntsvillce, Worthen MSS., pLxx,fig.l 534 



Subgenus Zeacrinus 534 



- P. {Zeacrinus) arboreus, "Worthen MSS., pi. xx. fig. 5 534-535 



P. (ZcacriwMs) carmi/eroMS, Worthen MSS., pi. XX, fig.4 535-536 



P. (Zeacrinus) compactilis, "Worthen MSS., pi. xxi, fig. 5 536-537 



Dichocrinus, Munster 537 



D. cornigerus, Shumard 1 1860, pi. xx, fig. 6 537 



Granatocrinus 537 



G.gldber, M. & "W., 1869, pi. xx, fig. 11 537-539 



MoUusca. 



Lamellibranchiata. 



Lithophaga f pertenuis, M. & "W., 1865, pL xxii, flg. 1 539-540 



Myalina 540 



M. St. ludovici, "Worthen MSS., pi. xxii, fig. 3 540 



Ohamomya, M. <fc. "W 540 



a f rhomboidea, M. & "W., 1865, pi. xxii, fig. 4 540-511 



Pteropoda. 



Conularia 541 



O. missduriensis, Swallow ? 1860, pi. xxii, fig. 5 541-542 



Cephalopoda. 



Nautilus 543 



N. (Temnocheilus) cnxanus, M. Sc "W., 1869, pi. xxiii, fig. 1 .543-544 



N. (Solenocheilus) collectus, M. &. W., 1870, pi. xxiii, figs. 3 and 4 544-545 



FOSSILS OF THE CHESTER GROUP. 



Echinodermata. 



Poteriocrinites 546 



P. bisselli, "Worthen MSS., pi. xxi, fig.4 546-.547 



Subgenus Zeacrintm 547 



P. (Zeacrinus?) armiger,^. & "W., 1870, pi. xxi, fig. 3 547-548 



P. (Zeacrinus) subtumidus, Worthen MSS., pi. xxi, flg. 1 548-549 



P. (Zeacrinus) formosus, "Worthen MSS., pi. xxi, flg. 2 549 



Subgenus .Scop/iiocrmw* 550 



P. (Scaph iocrinns) bayensis, M. & "W., 1865, pi. xx, flg. 2 550-551 



P. (Scaphioerinus) randolphcnsis, "U'orthen MSS., pi. xxi, fig. 14 551-552 



Onychocrimts 552 



0.w/ii(/fcidr, Hall8p.,1858,pl.xx,flg.3 552-554 



Eupachyerinus , ....,, 554 



