306 



INDEX OF GENERA AND SPECIES. 



Paso. 



Orthis 29, 30, 57, 58, 62, 72, 78, 85, 109, 116, 129, 



130, 131, 148, 151, 165, 177, 189, 190, 192, 

 198, 234, 235, 247, 248 



? 30,58,248 



arachnoides 333 



bellula 78 



biforata var. acutilirata 148 



lynx 130 



billlngsi 198 



borealis 78 



carbonaria 72, 85 



coloradoenais 66 



crenlstria 243 



cnneata !230 



electra 129 



ella 78 



emacerata 78 



eurekenais 189 



fissicosta 78 



hamburgensis 190 



Librida 57 



impreasa 192 



insculpta 78 



iowensis 62, 148 



var. fumariua 58 



loiiensia 1 90 



lucfarlanei 58,63, 192 



niichelini 109 



occidentalis 78, 130, 148 



pecosii 131, 177, 343 



porveta 190 



plicatella 78,130 



(Platystiophia) acutilirata 78 



biforata 78 



dentata . . '. 78 



laticosta .' 78 



lynx 78 



pogonipenaia 334 



ivaupinata ? 235 



loaupinoides 151 



retrorsa 78 



snbelliptica 116 



subcariuata 57 



subquadrata 78, 148 



tostudiuaria 130, 190, 248 ? 



thiemei 116, 165 



triccnaria 190 



tulliensia 192 



mubraculuni ? 232 



Oithiaiiia 257 



? 257 



craaaa 19,20 



luiasouriana 52 



missourienaia 20 



abumardiana 20 



unibraculuni 20, 274 



Oriboceras . .25, 27, 36, 39, 44, :>5, 74, 79, 87, 91, 94, 109, 

 110, 126, 129, 154, 179, 187, 195, 198, 248 



? 191,198,258 



anellum 55 



angulatuiu 91 



anuulato-costatum 44 



annulatuin 154 



anuiilocoatatum 37 



baculum 33,94 



Page. 



Othoccraa blakoi 110 



(Canieroceras) colon 129 



colon 136 



cribroaum 74 



crebriatriatum 39,91 



eurekenais 198 



expansum 35,27,44 



? isogramma 67 



jolietenaia 39, 91 



kingii 109 



marginale 347 



medullare 91 



uiulticameratum 191 



nobile 39 



nova mexicana 343 



oneidaense 187 



(Ormoceras) beckii 55 



oi'toni 68, 79 



randolphensia 198 



ruahensis 87, 179 



aubbaculum 39 



undulatum 347 



■wincbellii 39, 91 



Orthocerata 191 



OrthoceratitidiB 109, 110 



Orthonema 37, 46,74,80,86 



conica 40, 86 



newberryi 67, 80 



salteri 46 



aubtaeniata 51, 74 



Orthonota 116 



Orthonychia 40 



Ostraca 227 



Ostracoda 136 



Oatrea 28, 33, 93, 94, 105, 111, 133, 136,142, 



151, 158, 160, 172, 173, 205, 200, 209, 



211, 213, 216, 217, 219, 233, 236, 237, 



262, 266, 270, 271 



? 97 



alabamensis 237 



(Alectryonia) bellaplicata 142 



blackii 151,158 



larva 173 



linguafelis 371 



procumbens 172 



sanuionia 136,142 



americana 172 



anomiicfoiinia 172 



anoniioides 76, 158, 172 



apreasa 172 



atwoodi 237,238 



barrandei 172 



bella ;. . . 172, 319 



bellaragoaa 172 



bclliplicata 172 



blackii 173 



brewori • 172 



borealis 237 



bryani 172 



bourgeoisii 238 



boussiugauUii 206 



carinata 172, 219 



carolinonais 172, 237 



comprnsairostra 237 



conchaphila 238 



