330 KANSAS UNIVERSITY SCIENCE BULLETIN. 



PAGES 



Oligoporus minutug 165 



Orbiculoidea nianhattensis 179 



Orbiculoidea missourienais 168, 174 



Orbitosphenoid of the Mosaeaurs 250 



Ordinary lines en monoid 313 



Orthoceras, cf . rushensis McChesney 174 



Orthoceras cribosum 171 



Orthoceras sp 168 



Ostracoda 175 



Parabolic transformations 130 



Paraclius 77 



Paraclius abdominalis, n. sp 78 



Paraclius arcuatus 80 



Paraclius bellus, n. sp 81 



Paraclius claviculatus 81 



Paraclius discifer, n. sp 80 



Paraclius filiferus 81 



Paraclius fuscicornis, n. sp 79 



Paraclius nigripes, n . sp 78 



Paraclius quadrinotatus, n. sp 81 



Paraclius venustus 81 



Pelastoneurus argentiferus 82 



Pinna lata Beede 173 



Pinna lata, n. sp 149 



Pinna peracuta 168 



Pinna pericuta 166, 175, 176 



Pinna subspatula 166 



Pinnatopora elliptica 170 



Pinnatopora pyriformipora Rogers ? 172 



Pinnatopora pyriformis 165 



Pinnatopora tenuilineata ( Meek ) Ulrich 172 



Placunopsis carbonaria Meek and Worthen 173 



Plagioneurus univittatus 83 



Platecarpus species from North Dakota 252 



Plesioeaurs, a preliminary list of American forms 141 



Pleurophorus, cf. angulatus 175 



Pleurophorus tropidopherus 171, 175 



Pleurophorus whitei, n. sp 150 



Pleurotenaria tabulata 166 



Pleurotomaria illinoiensis Worthen? 173 



Pleurotomaria perhumerosa 171, 178 



Pleurotomaria sphrerulata 171 



Pleurotomaria subdecussata 171, 175 



Pleurotomaria tabulata Conrad 174 



Pleurophorus whitei 180 



Polypora aspera Rogers 172 



Polypora distincta 164, 165 



Polypora elliptica Rogers 164, 167, 172 



Polypora nodocarinata 164, 166 



Polypora sp 172 



