WRITINGS OF F. B. MEEK AND A. IT. WORTHEN. 91 



LOWER SILURIAN SPECIES. 



Hchinoderniata. Page. 



Somocrinus, Hall 492 



H.angustatxis, M. & W., 1870, pi. xxiii, fig. 8 492-493 



Heterocrinus crastius, M. & W., 1865, pi. xxiii, fig. 1 493 



Mollusca. 

 Lamellibranchiata. 



Modiolopsis subnasuta, M. & W., 1870, pi. xxiii, figs. 9 a, 6 494-495 



Gasteropoda. 



Subulites, Coni-ad 495 



S.inflatus, M. & W., 1869, pi. xxiii, fig. 5 495-496 



Articvlata. 



Asaphus, Brongniart 497 



A. (Isotelus) vigilana, M. & "W., 1870, pi. xxiii, fig. 6 497-498 



UPPER SILURIAN SPECIES. 



Spongice. 



Astylospongia prcemoraa, Goldf. 1 sp., 1826, pi. xxv, figs. 2, 2 a 499 



Foraminifera ? 



Eeceptaculites, Defrance 500 



It.formosus,M. & W., 1870, pi. xxiv, fig. 1 500 



£rachiopoda. 



Strieklandinia, Billing.s 502 



S. de/ormis, M. & W., 1870, pi. xxiv, figs. 5 a, 6 502-503 



Cephalopoda. 



Orthoceras, Auct 503 



O. crebristriatum,M. & W., 1865, pi. xxvi, fig. 2 503-504 



O. medullar e,^^ ? 1860, pi. xxvi, fig. 1 504 



O. angulation, Wabl, 1827, pi. xxiv, fig. 8 504 



• 0.jolietenais,M. & W., 186-3, pi. xxvi, fig. 5 505 



Cyrtoceras, Goldfuss 506 



0. dardanw*-, Hall ? 1861, pi. xxv, fig. 6 506 



Lituites, Breyn 507 



L.gra/tonensis,M. &W., 1869, pi. xxv, fig. 1 507-508 



Crustacea. 



Liehas, Dalman 508 



L. boltoni, Bigsby, sp., 1825, pi. xxv, fig. 5 508 



Illaenus, Dalman 508 



1. (Buniastus) graftonensis, M. & W., 1869, pi. xxv, fig. 4 508-510 



Sphcerexochus, Bey rich . . .' 510 



S. romingeri, Hall, 1862, pi. xxiv, fig. 4 510 



Mollusca. 

 Cephalopoda. 



Phragmoceras 511 



P.walshii,M. & W., 1866, pi. xxviii, figs. 2 a,b 511-512 



Orthoceras 512 



C. winchelli, M. & W., 1866, pi. xxviii, fig. 1 512-513 



LOWER CARBONIFEROUS SPECIES. 

 Echino dermata. 



Synhathocrinus, Phillips 514 



;S'. robustus, Shuniard, 1866, pi. xxix, fig. 4 1 514 



Dichocrinus, Munster 515 



D. fieus, Cas.seday & Lyon, 1860, pi. xxix, fig. 7 515 



Poteriocrinus 516 



Subgenus Scaphiocrirms, Hall 519 



P. {Scaphiocrinus) unicus, Hall, 1861, pi. xxix, fig. 1 519 



Pentremites, Say 521 



P. {Tricoelocriaus), of/Ji'g?ta<MS Roemer, sp., 1852, pi. xxxi, fig. 4 521 



Spirifer, Sowerby 521 



a.fastigatus, M. & W., 1870, pi. xxx, fig. 3 521-523 



S.neglectus, Hall, 1858, pi. xxx, figs. 2 a, and Ic 523 



8. suborbicularis, Hall, 1858, pi. xxx, fig. 1 523-524 



