370 



INDEX 



Chimaeroidei, 68, 69, 118 



autostyly in, 65 



characters of order, 118 



fin spines of, 139 



in Iowa Devonian, 48 



list of, 277 



origin of, 119 

 "Chirodus", 228 

 Chondrostei, 69 



characters of suborder, 255 



history of, 255 



Palaeozoic, characters of, 63 

 Chordata, characters of, 52 

 Cladistia, 69 

 Cladodontidae, characters of family, 



107 

 Cladodus, characters of genus, 107 

 Clarlodus sp., 2S7 



alternatus, 111 



carinatus, 109 



claypolei, 282 



concinnus, 109, 110, 283 



coniger, 109, 287 



exiguns, 111 



exilis, 111 



formosus, 110, 286 



monroei, 108, 276 



pattersoni, 111 



prototypus, 108, 276 



rivi-petrosi, 283 



springeri, 111 



striatus, 108 



subulatus, 283 



succinctus, 111 



tcrrelli, 283 



tumidus, 283 



urbs-ludovici, 110, 281 



wachsmvthi, 111 

 Cladoselache, characters of genus, .97 



(?) dermal denticles of, 281 



dermal tubercles of, 276 



fins of, 99 



musculature of, 266 



spines of, 152 

 Cladoselache sp., 281 



clarki, 283 



fylcri, 61, 283 



kepleri, 283 



sinvatus, 283 



Clark county, Kentucky, fish regains 



from, 283 

 Clarke, J. M., acknowledgments, 291 

 cited, 83, 105, 113, 114, 116, 132. 191, 



198, 257, 258, 260 



Clay, production by counties, 14, 19 



by years, 13 



classified, 19 



rank of Iowa in, 21 

 Clay, raw, production of, 22 

 Claypole, E. W., cited, 73, 146, 154, 193, 



199, 200 



Cleveland, Ohio, fish remains from. 61, 



213, 285 

 Cleveland shale, Ohio, fish remains Li, 



100, 106, 180, 201, 213, 282, 283 

 Clifton Springs, New York, fish re- 

 mains from, 278 

 Climatius, 61 

 Climatius latispinosus, 276 



scutiger, 60 

 Coal, production of, by counties, 14, 17 

 by years, 13 

 rank of Iowa in, 18 

 Coal, use of topographic maps in study 



of, 4 

 Coal Measures, fish remains in, 104, 



234, 250, 254, 273 

 Coblenzian fauna of Germany, relations 

 of, to Lower Devonian of Maine, 

 83 

 Coccosteans, development of, 163, 164 



relations of, 159, 160 

 Coccosteidae, characters of family, 18-'i 

 Coccosteus, characters of genus, 186 

 relations to Brachydirus, 18i 

 relations to Dinichthys, 185, 188 

 relations to > Protitanichth3~s, 201 

 vertebral arches in, 185 

 Coccosteus sp., 278 

 americanus, 187 

 canadensis, 1S6, 280 

 cuyahogae, 283 

 decipiens, 186, 187 

 halmodevs. 191 

 macromus, 1S6, 287 

 occidentalis, 186, 187, ?7S 



relations to Protitnni hthys. 202 

 spatulatus. 278 



