INDEX. 



Ill 



PAGE. 



Dichocrinus eonus 169 



Diplodus 59 



Diplodus compressus 60 



— duplicates 61 



— incurvus 62 



— latus .'. 59 



Debpanacanthds 120 



Drepanacanthus anceps 122 



— gemmatus 123 



— ? stellatus 125 



Echinoidea 225, 247, 294 



Echinodermata 147, 167, 234, 263, 288 



Edestus 84 



Edestus minor 84 



Edmondia , 346 



Edniondia unioniformis ? 346 



Endolobus 307 



Entomosteaca 393 



Erisocrinds 315 



Erisocrinus conoideus 318 



— tuberculatus 319 



— typus 317 



Eumicrotis 336 



Eumicrotis Hawni var. sinuata 338 



E0PACHYCRINUS 177 



FORBESIOCRINUS 270 



Fossil Ferns 427 



Fossil Fishes in Illinois strata, occur- 

 rence of 11 



Fossil Plants, report on 425 



Gasteropoda 158, 260, 284, 302, 351 



goniasteroidocrinus 219, 222 



Goniatites 165, 390 



Goniatites globulosus 390 



— iowensis 392 



— Lyoni 165 



Granatocrinus 274 



Granatocrinus cornutus 276 



Gilbertsocrinus 217, 219, 222 



Gilbertsocrinus fiscellus 222 



Gyromices ammonis 462 



Helodus 74 



Helodus angulatus 83 



— biformis 77 



60 Oct. 10, 1866. 



PAGE. 



Helodus carbonarius 75 



— compressus 78 



— coniculus 75 



— consolidatus 87 



— crenulatus 82 



— denshumani 76 



— denticulatus 81 



— elytra 78 



— gibbosus 79 



— Umax 80 



— (Oochliodus) nobilis 88 



— placenta 80 



— politus 79 



— sulcatus 83 



— undulatus 82 



HOMACANTHUS 113 



Homacanthus gibbosus 113 



— ? rectus 115 



Hymenophyllites 436 



Hymenophyllites alatus 437 



— Clarkii 438 



— hirsutus 437 



— pinnatifidus 436 



— spinosus 436 



Insecta 410 



Invertebrate Fossils of Coal Measures.,310 



Invertebrates, supplement to 412 



Isopoda 399 



LAMELLIBRANCHIATA..156, 231, 256, 281, 300 



Lepidodendron 451 



Lepidodendron clypeatum 455 



— costatum 453 



— diplotegioides 452 



— obovatum 455 



— obscurum 453 



— radicans 454 



— simplex 454 



— turbinatum 453 



— Velthemianum 455 



— • Worthenii 452 



Lepidophyllum 456 



Lepidophyllum auriculatum 457 



— lanceolatum 556 



— majus 456 



Lepidophloyos 457 



Lepidophloyos obcordatum 457 



