30G 



INDEX or n EN ERA AND SrECIES. 



Page. 



Orthis 29, 30, 57, 58, 62, 7'J, 78, 85, 109, 1 16, 129. 



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

 198, 234, 235, 247, 248 



J 30, 58, 248 



arachnoides 233 



bellula - 78 



bilbrata var. acatilirata 148 



IjTix 130 



biUlngsi 198 



borealis 78 



carbonaria 72, 85 



coloradoensis 66 



crenistria 243 



caneata i230 



electra 129 



ella 78 



emacerata 78 



enrekensis 189 



fltisicosta 78 



liamburgensiH 190 



bibrida 57 



iinpressa 192 



insculpta 78 



iowensis G2, 148 



var. f umarius 58 



lonensis ] 90 



iiicfai lanei 58, 6*, 192 



niichelini 109 



occideutalis 78, 130, 148 



peco.sii 131,177,243 



])erveta 190 



plicatella 78, 130 



(Platystropbia) acutilirata 78 



bilorata 78 



dentata 78 



laticosta 78 



lynx 78 



pogonipensis 234 



resapinata ! 235 



resupinoidea 151 



retrorsa 78 



sabelliptica 116 



sabtaritiat^ 57 



subquadrata 78, 148 



lestndiuaria 130, 190,248? 



thiemei 116,165 



fricenaria 190 



tallifiDHis 192 



iinibracnluni ! 232 



Oithisina 2.57 



? 257 



craA.sa 19, 20 



missonriana 52 



missouriensis 20 



Mliuiuardiana 20 



iiinbraculum 20, 274 



OrthoceraH . .25, 27, 36, 39, 44, .55, 74, 79, 87, 91, 94, 109, 

 110, 126, 129, 154, 179, 187. 19.5, 198, 248 



r 191, 198,2.58 



anellnin 55 



angulatum 91 



annulato-costatum 44 



auniilatum 154 



annulocostatnni 27 



baculum 22,94 



Page. 



OthoMiius blakni 110 



(Canieroceras) colon 129 



colon 126 



cribrosum 74 



crebiistriatum 39, 91 



eurekensis 198 



expansnm 25,27,44 



?i8ogramma 67 



jolietensis 39, 91 



kingii 109 



rnarginale 247 



mudnllare 91 



mnlticameratum 191 



nobile 39 



nova mexicana 243 



oneidaense 187 



(Onnoceras) btfckii 55 



ortoni 68, 79 



randolpbensis 198 



rnshensis 87, 179 



subbaculum 39 



nndulatum 247 



wincliellii 39, 91 



Oithocei ata 191 



Orthoceratitidae 109, 110 



Orthonema 27, 46,74,80,86 



couica 40, 86 



ne wberryl 67, 80 



aalteri 40 



snbtffiniata 51, 74 



Orthoiiota 116 



Oitbonycbia 40 



Ostraca 227 



Ostracoda 136 



Ostrea 28, 33, 93, 94, 10.5, 111, 133, 136.142, 



151, 158, 160, 172, 173, 205, 2U6, 209, 



211, 213, 210, 217, 219, 233, 236. 237, 



262, 266, 270. 271 



? 97 



alabamenHis 237 



(Alectryonia) bcllaplicata 142 



blacku 151,158 



larva 173 



linguafelia 271 



procnmbpns 172 



annnionis 136,142 



amrricana 172 



anomuEfonniH 172 



anoniioides 76, 158, 172 



apressa 172 



atwoodi 237,238 



barrandei 172 



bella 172,219 



bellamgosa 172 



belliplicata 172 



blackii 172 



breweri 172 



borealia 237 



bryani 172 



bourgeoisii 238 



bouaaingaultii 200 



carinala 172, 219 



carolinensia 172,237 



compreaairoatra 237 



concbaphila 238 



