120 GENERAL, INDEX. 



Nerita haliotis Sby 111,385 



( " price! Shum.) V.592 



" spirata Sby 11,366 



( ' ) subcostata Goldf II, 364 



Nicholsonella Ulrich VIII.374,421 



cumulata Ulr VIII.374,423* 



ponderosa Ulr VIII.374,422* 



vaupoliUh- VI II, 421, 422, 423 



Nipterocrinus Wachsmuth V, 434 



arboreus Worthen ...V.436* 



wachsmuthi M. W V.435* 



Nucleocrinus Conrad 11,275 ; VII, 357 



" angularis Lyon VII, 360 



" ? canadensis Montgomery VII, 357 



e;ogans Conr VII.362 



lucina Hall VII.360 



meloniformis Barris VII, 361 



Nucula Lamarck V.589; VIII.128 



" ? beyrichi Schaur V.589* 



illinoiensis Worthen VIII, 128* 



" parva McCoy V.589* 



Nuculana Link 11,283 



" ? curtaM. &W 11,283* 



sp. indet V.P1. xxvi.fig. 10* 



Obolus Eichwald 111,351 



(Trimerella?) conradi Hall Ill, 351* 



davidsoni Salter Ill, 351 



Odontaspis Agassiz VI.276 



Odontocephalus Conrad Ill, 416 



tegeria (Hall?) 111,417* 



arenarius M. & W 111,417 



' ' selenurus Conr Ill, 417 



sp. indet 111,416* 



Odontochile Ha wle and Corda 111,367.391 



(Odontotrypa Hall) VIIL383 



Oligoporus Meek and Worthen 11,226,247 



danze M. & W II,248t,249*; III,524t; V.477 



nobilis M. & W V.476* 



(Olivanitos Troost) VII, 357 



Ollacrinus Cumberland II, 225 



( " ?)flscellus M. & W 11,225 



Omphalotrochus Meek 11,159 



Onchus hainatus Ag VI.450 



Oncoceras Hall Ill, 446 



Onychaster Meek and Worthen 111,526; V, 474 



barrisi (Hall) V.476* 



flexilis M. & W 111,5261; V,475,510* 



Onychocrinus Lyon and Casseday ....11,242; 111,492; V.498,552; VI.520; VII.307; VIII.199 



asteriformis (Hall) 11,243; 111,494 



distensus Worthen VII, 307* 



diversus M. & W 11,243; III,492t* 



exsculptus Ly. & Cass 11,247; V.498* 



magnus Worthen VI, 520* 



meeki (Hall) V.553 



