INDEX. 



363 



OboIcUji maculata, Hicks, . 



0. misera, Billings, 



O. nana, Meek and Hayden, 



O. nilida, Ford, . 



O. Phillipsi, Holl, 



O. polila, Hall, 



0. pretiosa, Billings, 



O. Sabrina;, Callaway, 



O. sagittalis, Salter, 



O. transversa. Ilartt, 



Obolus advena, Barrande, 



O. antiqiiissimus, von Eichivald, 



O, Apollinis, von Eichwald, 



O. Appolinus, Owen, 



O. ? Bohemicus, Barrande, 



0. ? complexus, Barrande, 



O. ingricus, von Eichwald, 



O. Lahradoricus , Billing;?, 



O. pulcher, Mattlicw, 



O. Quenstedti, Mickwitz, 



O. siluricus, vo7i Eichwald, 



CEhlertella pleurites, Meek, . 



Orbicula antiquissima, von Eicli\val<l 



O. Buchi, de Verneuil, . 



O. ccelata, Hall, 



O. crassa, Hall, 



O. deformata, Hall, . 



O. Morrisi, Davidson, 



O. norvegica, Soworby, 



O. norvegica, Lamarck, 



O. punctata, Sowerby, 



0. reversa, de Verneuil, 



0. ? squamiformis , Hall, 



O. terminalis, Emmons, 



Orbiculoidea, sp. ? Meek, 



O. conica, Dwight, 



O. Daviiisoni, d'Orbigny, 



O. Forhesi, Davidson, 



O. grandis, Vanuxeni, 



O. Herzeri, sp. nov. 



O. Morrisi, Davidson, 



O. Newberryi, Hall, 



O. nitida, Phillips, 



O. numulus, sp- nov. 



O. Randalli, Hall, 



O. tenuilamelUtta, Hall, 



O. (Rcemerella) grandis, ; 



O- (Schlzotreta) ovalis, sp. nov. 



Oi'tJiavibonites transversa, Pander, 



Orthis acutiloba, Ringuebei g, 



O. acutilirata, Conrad, 



O. tequivalvis, Hall, 



O. alternata, . 



O. alsa, Hall, 



O. ? apicalis, Billings, 



O. arachnoidea, Phillips, 



O. arcuaria, sp. nov., 



O. Armanda, Billings, 



O. assimilis, Hall, 



O. Aurelia, Billings, 



O. basalis. Dolman. . 



O. Battis, Billings, 



O. Baylii, UouauU, 



O. bellarugosa, Hall^ 



; bellula, James, 



biforata, von Schlotheim, 

 Billinffsi, llartf, 

 Mllingsi, SalTonl, 

 biloba, Linne, 

 borcaliri, Billings, 

 Bouchurcli, Davidson, 

 Burlin^Lonensis, Hall, 

 callactis, Dalman, 

 calligramma, Dalman, 190, 11 



191, 192 



Jl, 102, 193 



231 



de Ver 

 'oerste. 



20; 



calligrammii, \ar. Davi'lson 



calligramma, var. jlabHlites, \ 



calligramma, var, orthumhonites, IJillin 



carinata, Hall, 



circularis, 



circulus. Hail, 



Clarkensis, Swallow, . 



Cleobis. Halt, 



Clylie, Hall, 



coucinna. Hall, 



corallina, Waagen, 



Corinna, Billings, 



costalis, Hall, . 



crassa, Meek, 



crenistria, Phillips, 



crispata, Emmons, 



Camberlaiulia, Hall, . 



cuneata, Oiven, 



cyclas. Hall, 



cylindrica, . 



Dalyana, Miller, 



Davidsoni, de Verneuil, 



Daytonensis, Foerste, 



deflecta, Conrad, . 



de/ormis, Hall, 



demissa, 



Derbyi, Waagen, 



Deshayesi, . 



dichotoma, Hall, 



discus. Hall, 



disparilis, Conrad, 



dubia, Hall, 



elcctra, Billings, 



elegans, Bouchard, 



eless.Dlu\a, Dalman, 191,192,207 



elegantula, var. parva, 



Ella, Hall, 



emacerata, Hall, . 



emiuens, Hall, 



Furekensis, WalcoLt, 



Euryone, Billings, 



Evadne, Billings, 



excavata, Geinitz, 



eximia, dc Verneuil, 



expansa, Sowerby, 



extensa, Pander, . 



fasciata, Hall, . 



fausta, Foerste, 



flssicosta. Hall, 



flabellites, Hall, 



flahellulum. Hall, 



flabellulum, Sowerby, 



gemmicula, Billings, . 



PAGE. 



224 



190,200, 223 



232 



. 219 



190, !i04, 205, 223 



222 



217 



. 225 



196, 228 



195, 219 



212, 211 



19J, 227 



194, 



,233, 



neuil, 



228 



. 321 



213, 226 



. 259 



210, 224 



. 225 



225 



, 203, 223 



207, 22t 



. 210 



217 



221, 227, 228 



223 



. 248 



224 



. 225 



225 



. 225 



262 



. 225 



192, 221, 228 



. 222 



222 



. 355 



191, 192 



. 214 



243 



. 221 



210, 225 



191, 221, 223 



210, 225 



219 

 ,221, 341 



224 



. 221 



207, 224 



210, 225 



232 

 221, 228 



2-23 

 . 315 



266 

 . 283 



219 

 200, 222 



222 

 194, 221 

 227, 228 

 221, 227 



227 

 217, 2+4 



