242 INDEX. 



PAGE 



Productella subaculeata, var. cataracta 69 



Rhynchonella acinus 73 



bellaf orma 73 



Carolina. _ _. 75 



gainesi 76 



increbescens 83 



indianensis 76 



louisvillensis 77 



pisa 78 



rugaecosta 78 



saffordi 79 



saffordi, var. depressa 80 



stricklandi 81 



tenuistriata _ 82 



tethys : 83 



Rhynchotreta cuneata, var. americana 85 



Spirif era acuminata 105 



arctisegmenta 108 



atwaterana 107 



byrnesi 109 



conradana 110 



crispa, var. simplex 111 



davisi , 112 



divaricata 113 



dubia .__ 115 



dnodenaria 114 



euruteines 115 



eurnteines, var. fornacula 117 



foggi _ 117 



gregaria 119 



grieri _ 120 



hobbsi 121 



knappiana 122 



macconathii 123 



marionensis . . _ 124 



medialis.. 125 



mucronata 126 



oweni 126 



radiata . _ 130 



raricosta ,. .,.. 123 



