INDEX OF GENERA AND SPECIES. 



[The page numbers in heavy type indicate references to the original descriptions.] 



A. Page. 



Abra ? formosa , 48 



Acambona 119 



pinna 129 



Acanthocardium 99 



Acanthocladia americana 19, 257 



Acanthotelson 36,46,53,61,179 



eveni 53,61.179 



inaequalis 36,46 



stimpsoni 36, 46, 61, 179 



Acanthotelsonidaa 36 



Acar 98 



AceUa 106,141,161 



haldemani 141,161 



Acephala 225,232,255,258,274 



Acervularia 108, 150, 155, 163, 223 



adjunctiva 130, 163 



davidsoni 155 



pentagona 108, 192 



Acidaspis 57, 79, 186 



ceralepta 79 



cincinnatiensis 79 



crosotns 79 



hnmata 57 



parvula 186 



Acila 98 



Aclis 74,86,152 



robnsta 86 



? stevensoni 158 



swaUoviana 74 



Acmsea occidentalis 102 



papillata 102 



parva 102 



Acmseidas 102 



Acoeli 35 



Acrochordiceras 110, 339 



hyatti 110,339 



Acroloxns 106, 161 



minntas 106, 161, 169 



Acrothele 189, 198 



fdichotoma 189 



matthewi 198 



Acrotreta 126, 129, 189 



gemma 189 



pyxidicula 126, 129 



subsidna 136^129 



Actaaon 94, 101, 143 



attennatus 101 



concinnns 13 



ellipticus 50 



impressa 330 



Page. 



Actaeon intercalaris 94 



melanellus 221 



pygmaens 221 



(Solidula) attennnta 18 



striatns 221 



subellipticns 14, 101 



woosteri 143 



Actseonella 29,210 



syriaca 310 



Actajonema striata 220 



sulcata 220 



ActiBonidas 101 



Actasonina 29, 86, 143 



biplicata 48 



minuta 86 



naticoides 48 



prosocheila .. 143 



ActsBoninae 29 



Actinaria 96, 142, 165 



Actinoceramus 47, 97 



Actinoceras 27 



ActinocrinidaB 53, 81 



Actinocrinites 81, 87 



delicatns 81 



longus 81 



penicillus 81 



sculptilis 87 



sculptus 81 



Actinocrinus 23, 26, 37, 38, 41, 42, 59, 118, 127, 



130, 149, 105 

 (Alloprosallocrinus) euconus . 38 

 (Amphoracrinus?) concavus-. 36 

 sub t u r b i - 



natus 33 



araneolus 33 



astenscus 5S3 



(Batocrinus) asteriscus 43 



dodecadactylus.. 42 



pistilliformis 41 



pistillus 59 



calyculus var. pardinensis ... 40 



concinnus 42 



delicatus 87 



dodecadactylus 36 



evansii 349 



nashviUsB var. subtractus 118 



pistillus 37 



(Pradocrinns amplus 36 



pyriformis var. rudis 20 



quadrispinns 118 



275 



