WRITINGS OF F. B< MEEK AND A. H. WORTHEN. 81 



Page. 



Bellcrophon, Mont fort, n08 222 



B.newberryi,Mee^i, 1871, pi. xx, fig. 5, and flg.— ,p.223 222-225 



^. pflstM^Ms, Hall, lig. — , p. 223 223 



B. propinquus, Meek, 1871, pi. xx, figs. 4 a-b , 226 



Pleurotomaria, Defranoe, 1826 226 



P. iucinrt, HaH.M8C2, pi. XX, fig. 6 226-227 



Co7iularra,MnieT, lSlS,Mii 228 



O. elegantula, Meek, 1871, pi. xxiii, flg. 4 228-229 



Cephalopoda. 



Cyrtocerat.ites, Go\dfusH,lS301 229 



a oAioensrs, Meek, 1871, pi. xxiii, figs. 2 and 2 6 229-230 



Oyroceratites, Meyer, 1831 230 



O. {? Trochoceras) ohioends. Meek, 1871. pi. xxii 230-231 



O. (? NautiUin) inelegana, Meek, pi. xxi 232 



ArtMulata. 



Crustacea. 



Proe«?<s, Steininger, 1831 233 



P. planimarginatns, Meek, 1871, pi. xxiii, flgs. 3 a,b 233-234 



Dalmanites, Barrande, 1852 234 



D. ohioensis, Meek, 1871, pi. xxiii, flg. 1 234-236 



91. 



Meek, F. B., and Worthen, A. H. Paleontology. Descriptions of Invertebrates from 

 the Carboniferous System. <]Geological Survey of Illinois, vol. v, pp. 323-619, 

 pis. i-xxxii. 1873. Springfield, 1873. 



Published by authority of the legislature of Illinois, 1873. 

 Genera Physetocrinus, Nipterocrinus, Codonites. 



LOWEK CAliBONIKEROUa SPECIES. 

 FOSSILS OF THE BURLINGTON GROUP. 



Page. 

 Echinodermata 323 



Notes on the structure and habits of the Palaeozoic Crinoidea 323 



Synhathncrinus, Phillips 324 



Ooniasteroidocrinus, Lyon & Casseday *. 324-325 



Cyathocrinus, Miller 325-327 



Convoluted support of the digestive sack in the Actinocrinidce 327-329 



Ambulacral canaLs passing under the vault in the Aetinocrinidcn 329-339 



Actinocrinites, Miller 339-341 



Actinocrinites. Section (a) 342 



A. penicillug, M. & TV., 1869, pi. viii, fig. 2 342-343 



A. sculptus, Hall. 1858, pi. iv, fig. 2 343 



A. delicatxiH, M. & W., 1869, pi. viii, fig. 2 343-345 



Actinocrinites. Section (6) 345 



A. longus, M. & W., 1869, pi. viii, flg. 1 345-347 



Strotocrinus, M. & W., 1866 347-349 



S.? asperrimus, M. &.W., 1869, pi. viii, flg. 3 349-351 



Subgenus Physetocrinus, M. &W 351 



«. (Physetocrinus?) asper, M. & W., 1869, pi. vii, flg. 1. Section (6), p. 253 351-353 



S.ectypus, M. ifc W., 1869, pi. vii, flg. 5 353-355 



S. liratvs. Hall, sp., 1860, pi. vii, fig. 2 355-357 



S. perumbrosus. Hall, sp., 1860, pi. viii, flg. 4 357-360 



S.umbrosvs, Hall, sp., 1858, pi. viii, flg. 5 360-362 



S. (Physetocrinus) dilatatus, M. & "W., 1869, pi. x, flg. 6 363-364 



Batocrinus, Casseday 364-368 



B.quasillus, M. & \V., 1869, pi. v, flg.2 369-370 



B. (Erettnocrinus) remibrachiatus, Hall's sp., 1861, pi. x, flg. 5 370 



B. cassedayamis, M. i W., 1868, pi. v, flg. 1 370-372 



B. trochiscus, M. &. W., 1868, pi. v, flg. 6 372-374 



B. pyrifornds, Slinmard sp., 1855, pi. v. flg. 5 375-377 



B.(Eretmocrinus?) neglectus, M. & W., 1868, pi. v, flg. 3 37.7-379 



B.rhristyl, Sliuniaid's .sp., pi. v, fig. 4 ...,,.,.,,,,,..... 379. 



120— Bull. 30 6 



