942 Report oF THE STATE GEOLOGIST. 
Pachyrhynchus, IL, 145 (893). 
Paleocrania, I, 129 (261). 
Paterula, I, 110 (242). 
Parastrophia, IT, 91 (839). 
Parazyga, II, 52 (800). 
Paterina, I, 115 (247). 
Pentactinella, IT, 35 (783). 
Pentagonia, II, 27 (775). 
Pentamerella, II, 97 (845). 
Pentamerus, II, 96 (844). 
Peregrinella, IT, 87 (835). 
Pexidella, IT, 38 (786). 
Pholidops, I, 180 (262). 
Pholidostrophia, I, 149 (281). 
Plesiomys, I, 134 (266). 
Plesiothyris, II, 138 (886). 
Platidia, IT, 147 (895). 
Platystrophia, I, 136 (268). 
Plectambonites, I, 158 (290). 
Plectorthis, I, 134 (266). 
Plethorhynchus, II, 79 (827). 
Plicigera, IL, 25 (783). 
Polytcechia, I, 143 (275). 
Pomatospirella, II, 36 (784). 
Porambonites, II, 92 (840). 
Productella, I, 166 (298). 
Productus, I, 165 (297). 
Proboscidella, I, 166 (298). 
Pronites, I, 142 (274) 
Propygope, II, 130 (878). 
Protorhyncha, II, 76 (824). 
Protorthis, I, 141 (273). 
Protozyga, II, 61 (809). 
Pseudocrania, I, 120 (261). 
Pterophloios, I1, 152 (900). 
Ptychospira, IT, 44 (792). 
Pugnax, II, 80 (828). 
Pygope, II, 129 (877). 
Rafinesquina, I, 147 (279). 
Rensselzeria, II, 101 (849). 
Reticularia II, 8 (756). 
Retzia, II, 39 (787). 
Rheetina, II, 131 (879). 
Rhinobolus, I, 107 (239). 
Rhipidomella, I, 139 (271). 
Rhynchonella, II, 74 (822). 
Rhynchonellina, IT, 85 (833). 
Rhynchopora, II, 84 (832). 
Rhynchora, II, 146 (894). 
Rhyncborina, IT, 146 (894). 
Rhynchospira, IT, 48 (791). 
Rhynchotrema, II, 77 (825). 
Rhynchotreta, IT, 77 (825). 
Richthofenia, IT, 157 (905). 
Roemerella, I, 125 (257). 
Romingerina, II, 107 (855). 
Scaphioccelia, IT, 109 (857). 
Scenidium, I, 144 (276). 
Schizambon, I, 121 (258). 
Schizobolus, I, 114 (246). 
Schizocrania, I, 127 (259). 
Schizopholis, I, 116 (248). 
Schizophoria, I, 140 (272). 
Schizotreta, I, 125 (257). 
Schmidtia, I, 112 (244). 
Selenella, II, 107 (855). 
Seminula, II, 33 (781). 
Sieberella, II, 97 (845). 
Siphonaria, I, 129 (261). 
Siphonotreta, I, 120 (252). 
Spirifer, II, 3 (751). 
Spirigera, IL, 27 (777). 
Spiriferina, IT, 16 (764). 
Spirigerella, IT, 34 (782). 
Spondylobolus, I, 118 (245). 
Stenoschisma, IT, 78 (826). 
Streptis, I. 157 (289). 
Streptorhynchus, I, 156 (288). 
Stricklandinia, II, 99 (847). 
Stringocephalus, II, 119 (867). 
Strophalosia, I, 163 (295). 
Stropheodonta, I, 148 (280). 
Strophomena, I, 151 (283). 
Strophonella, I, 150 (282). 
Suessia, IT, 17 (765). 
Syntrophia, II, 88 (836). 
Syringothyris, II, 12 (760). 
Terebratalia, II, 139 (887). 
Terebratella, II, 141 (889). 
Terebratula, IL, 126 (874). 
Terebratulina, II, 124 (872). 
Terebratuloidea, IT, 83 (831). 
Terebrirostra, I, 142 (890). 
Tetractinella, II, 35 (783). 
Thecidea, II, 149 (897). 
Thecidella, II, 151 (899). 
Thecidiopsis, II, 151 (899). 
Thecidium, I, 149 (897). 
Thecocyrtella, II, 17 (765). 
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