INDEX OF GENERA AND SPECIES. 



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



A. Page. 



Abra ? formosa 48 



Acambona H9 



pinna 129 



Acanthocardinm 99 



Acanthocladia americana 19, 257 



Acanthotelson 36,46,53,61,179 



eveni 53,61,179 



iu8Bqnalis 36, 46 



stimpsoni 36, 46, 61, 179 



Acanthotelsonidae 36 



Acar 98 



AceUa 106,141,161 



haldeniani 141,161 



Acephala 225,232,255,258,274 



Acermlaria 108, 150, 155, 163, 223 



adjunctiva 1 50, 163 



da"(ridsoni 155 



pentagona 108, 192 



Acidaspis 57, 79, 186 



ceralepta 79 



cincinnatiensis 79 



crosotus 79 



hnmata 57 



parvula 186 



Acila 88 



Aclis 74,86,152 



robnsta 86 



? Stevenson! 153 



swaUoviana 74 



Acmsea occidentalis 102 



papillata 102 



parva 102 



AcmseidsB 102 



Acoeli 35 



Acrochordiceras 110, 339 



hyatti 110,339 



Acroloxns 106, 161 



minutas 106,161, 169 



Acrothele 189, 198 



?dichotoma 189 



matthewl 198 



Acrotreta 126, 129, 189 



gemma 189 



pyxidicula 136, 129 



Bubsidna 136, 129 



Actaeon 94,101,143 



attennatns 101 



concinnns 13 



eUipticas 50 



impressa 330 



Page. 



ActsBon intercalaris 94 



melanellus 221 



pygmsens 221 



(Solidula) attennata 18 



striatus 221 



subollipticns 14, 101 



woosteri 143 



Actaeonella 29,210 



syriaca 310 



Actajonema striata 220 



sulcata 220 



ActSBonidae 101 



ActBBonina 29, 86, 143 



biplicata 48 



minata 86 



naticoides 48 



prosocheila 143 



ActsBoninae 29 



Actinaria 96,142,105 



Actinoceramus 47, 97 



Actinoceras 27 



ActinocrinidsB 53, 81 



Actinocrinites 81, 87 



delicatus 81 



longus 81 



penicillus 81 



sculptilis 87 



scnlptns 81 



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



130, 149, 1C5 

 (Alloprosallocrinus) euconus . 38 

 (Amphoracrinus?) concavas.. 36 

 sub t u r b i - 



natus 33 



araneolus 33 



astenscus 33 



(Batocrinus) astenscus 42 



dodecadactylus.. 42 



pistilliformis 41 



pistillus 59 



calyculus var. pardinensis ... 40 



concinnus 42 



delicatus 87 



dodecadactylus 36 



evansii 349 



nashvillse var. subtractus .... 118 



pistillus 37 



(Pradocrinus?) amplus 36 



pyriformis var. rudis 20 



qnadrispinus 118 



275 



