578 INDEX TO PAL^iONTOLOGICAL REPORTS OF GEOLOGICAL SURVEY. 



Coal, theory of its formation, 502,512 



Coal, Thompson's mine, Union county, fossils of, - - - - 346 



Coal, Union mines, Crittenden county, fossils of, 531 



Coal, value of, -. 564 



Codaster attenuatus, * ... .... 493 



Dismal Swamp, approximate cross section of, .... 508 



Dolatocrinus lacus, ... ... 483 



Drummond's lake of Dismal Swamp, - - 508, 509 



Explanation of plates of Coal Measures Molusca, - 577 



Explanation of plates of Crinoidea, ...... 495 



Fire-clay of Coal Measures, - ..... 511 



Fish remains in shales of coals Nos. 7, 9, and 12, - - - 540, 549, 560 



Fossil trees in sandstone of Coal Measures, 520 



Gervillia longispina, 568 



Goniatites nolinensis, ---..-... 574 



Limestones of the Coal Measures, ...... 519 



Lingula umbonata, ------_._ 575 



Loxonema regularis, ......... 535 



Macrocheilus gracilus, -..-..-.. 579 



Mylina pernaformis, - - 569 



Nautilus canaliculars, - - 575 



Nautilus decoratus, - -.-... 572 



Nautilus ferratus, - - - .... 574 



Olivanites angularis, - - 492 



Olivanites Verneuilii, 487 



Orthis resupinoides, ... ..... 570 



Paleeontological characters of the western coal-fields of Kentucky, - 522, 526 



Paleeontological report on the Coal Measure Molusca, ... 557 



Palseontological report of Sidney S. Lyon, .... 435 



Palseontological report of the fossil flora of Coal Measures, - - 499 



Pecten providensis, ......... 556 



Pentremites obesus, - 469 



Pleurotomaria Bonharborensis, 567 



Pleurotomaria depressa, ....... 559 



Plicatula striato-castata, ----..-. 553 



Productus muricatus, - - . . . . . 573 



Sandstones of the Coal Measures, .... . 520 



Shales, or roof slates, of coal, . 515 



Solenimya solemformis, ... . g^,g 



Vasocrinus sculptus, - - - - . . 435 



Vasocrinus valens, - - - . 495 



*This was printed Alternatus in several places in the report. 



