GENERAL INDEX 503 



Productus, Sowerby 103 



Productus alternatus .. 138 



P. altonensis Norwood and Pratten 124, X 



p. arcuatus Hall , 107, XIII 



P. biseriatus 141 



P. blairi Miller 110, XIV 



P. blairi 108 



P. burlingtonensis Hall 104, IX 



P. burlingtonensis _ 124 



P. cestriensis 136 



P. concentricus 98 



P. cooperensis 98 



P. corceformis 132 



P. crawfordsvillensis n. sp :... 116, XII 



P. curtirostris Winchell 130, XIV 



P. elegans 136 



P. fasciculatus 136 



P. fentonensis 117 



P. fernglenensis Weller 106, IX 



P. flmbriatus 141 



P. flemingi var. burlingtonensis 104 



P. flexis tria 136 



P. gallatinensis 124 



P. gradatus 138 



P. indianensis Hall 131, XVIII, LXXXIII 



P. inflatus McChesney Ill, X 



P. laevicostus 132 



P. magnus Meek and Worthen 117, XV 



P. magnus 116 



P. marginicinctus Prout 127, XIII 



P. mesialis Hall 112, X, LXXXIII 



P. mesicostalis n. sp 114, XI 



P. morbillianus 142 



P. ovatus Hall 132, XVI 



P. parvulus Winchell 128, XIV 



P. parvus Meek and Worthen 121, XVI 



p. pileiformis 132 



P. prattenianus 132 



P. pyxidatus 100 



P. sampsoni Weller 129, XIII 



P. scitulus Meek and Worthen 120, XIII 



P. sedaliensis n. sp 108, XIV 



P. semireticulatus 114, 122, 130 



P. setigerus Hall 122, XII 



P. setigerus ? var. kcoJcuk 114 



P. shumardianus 98, 100 



P. tenuicostus Hall 119, X, XI 



P. viminalis White 114, XI 



P. mttatus 138 



P. wortheni Hall 126, XIII 



Protremata 48 



Pseudosyrinx n. gen 404 



Pseudosyrinx gigas n. sp 410, LXVI 



P. keokuk n. sp 408, LXVI, LXVII 



P. missouriensis n. sp 406, LXV, LXVI 



P. sampsoni Weller 405, LXVII 



Ptychospira, Hall 435 



Ptychospira sexplicata (White and Whitfield) 435, LXXVI 



Pugnax, Hall and Clarke 202 



Pugnax explanatus .'. 173 



P. grecnianus 185 



P. grosvenori 183 



P. missouriensis 188, 189, 237 



P. mutata 181 



P. ottumwa .. 193 



