Annual Report for ... with Accompanying PapersPublished for the Iowa Geological Survey, 1908 - Geology |
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Acanthodian Agassiz Amer arches armor Arthrodires belonging bones Bothriolepis C. R. Eastman Carboniferous cartilage caudal fin Cedar Valley limestone Chemung Chemung group Chimaeroids Cladodus Cladoselache Claypole Cleveland shale Coccosteus Coelacanths cranial roof Crossopterygian Ctenacanthus Ctenodipterines dental plates denticles dentition dermal detached Dinichthys Dipnoans Dipterus dorsal fin Eastm Elasmobranchs external fauna fin-spines fishes Formation and locality fossil genus Geological headshield Holoptychius holotype Iowa J. S. Newberry Jaekel Johnson county Journ known lateral limestone lower dental plates Lower Devonian Macropetalichthys mandibular margin Middle Devonian N. Y. State Mus Newberry Ohio ornamentation Ostracoderms paired fins palæontology Palæozoic pectoral Pennsylvania portion posterior preserved primitive Professor Pterichthys Ptyctodonts Ptyctodus pustulosus Quarry beds Rept Rhadinichthys Rhynchodus ridges sensory canals shale sharks Smith Woodward species specimens spines structure surface Surv symphysial Synthetodus teeth text-fig tion Traquair tritors tubercles U. S. Geol Upper Devonian ventral vertebrates vomerine Waverly Whiteaves York