118 
BIBLIOGRAPHY AND INDEX OF N. A. GEOLOGY, [bull. 146. 
Paleontology— Continued . 
Genera and species described — Continued. 
Oreodon, Wortman, 571. 
Ornithostoma, Williston, 545. 
Orophocrinus stilliformis (Owen and Shu- 
mard), Keyes, 257. • 
Orthis Dalman emend Hall., "Winchell and 
Schuchert, 562. 
amoena 33". H. "Winchell, "Winchell and 
Schuchert, 562. 
burlingtonensis Hall, Keyes, 258. 
emacerata Hall, Keyes, 258. 
iowensis Hall, Keyes, 258. 
pecosii Marcou, Keyes, 258. 
suhquadrata Hall, Keyes, 258. 
swallowi Hall, Keyes, 258. 
tricenaria Conrad, Keyes, 258. 
tricenaria Conrad, Winchell and Schu- 
chert, 562. 
(Dalmanella) Hall, "Winchell and Schu- 
chert, 562. 
hamhurgensis ? Walcott, "Winchell 
and Schuchert, 562. 
subaequata Conrad, "Winchell and Schu- 
bert, 562. 
circularis N. H. "Winchell, Winchell 
and Schuchert, 562. 
gibbosa Billings, Winchell and Schu- 
chert, 562. 
perveta Conrad, Winchell and Schu- 
chert, 562. 
testudinaria Dalman, Winchell and 
Schuchert, 562. 
var. conradi N. H. Winchell, Winchell 
and Schuchert, 562. 
var. emacerata Hall, Winchell and 
Schuchert, 562. 
meeki Miller, Winchell and Schu- 
chert, 562. 
(Dinorthis) Hall, Winchell and Schuchert, 
562. 
deflecta Conrad sp., Winchell and 
Schuchert, 562. 
pectinella (Emmons) Hall, Winchell 
and Schuchert, 562. 
Tar. sweeneyi Winchell, Winch- 
ell and Schuchert, 562. 
meedsi W. and S., Winchell and 
Schuchert, 562. 
var. germana W. and S., Winch- 
ell and Schuchert, 562. 
subquadrata Hall, Winchell and 
Schuchert, 562. 
proavita W. and S., Winchell and 
Schuchert, 562. 
(Hebertella) Hall, Winchell and Schu- 
chert, 562. 
borealis Billings, Winchell and Schu- 
chert, 562. 
? bellarugosa Conrad, Winchell and 
Schuchert, 562. 
(Platystrophia) King, Winchell and 
Schuchert, 562. 
biforata Schlotheim sp., Winchell and 
Schuchert, 562. 
var. crassa James, Winchell and 
Schuchert, 562. 
Paleontology— Continued. 
Genera and species described — Continued. 
Orthis Dalman emend Hall 
(Plectorthis) Hall, Winchell and Schu- 
chert, 562. 
plicatella Hall, Winchell and Schu- 
chert, 562. 
whitfieldi N. H. Winchell, Winchell 
and Schuchert, 562. 
Orthoceras, Hyatt, 232. 
annulatum, var. americanum, Whiteaves, 
538. 
darwini Billings, Whiteaves, 538. 
ozarkensis Shumard, Keyes, 258. 
scammoniMcChesney, Whiteaves, 538. 
Orthoncychia Hall, Keyes, 258. 
acutirostre (Hall), Keyes, 258. 
chesterense (Meek and Worth en), Keyes, 
258. 
cyrtolites (McChesney), Keyes, 258. 
formosum (Keyes), Keyes, 258. 
spirale (Hall), Keyes, 258. 
Orthotheca cf. emmonsi, Matthew, 319. 
Oryctoblattina laqueata n. sp., Scudder, 427. 
Osmunda doroschkiana Goppert, Knowlton, 
270. 
Ostrea haydeni n. sp., White, 535. 
Oxyacodon n. gen., Osborn and Earle, 362. 
apiculatus n. sp., Osborn and Earle, 362. 
Oxyporus stiriacus, Scudder, 425. 
Pachydictya Ulrich, Ulrich, 485. 
acuta Hall, Ulrich, 485. 
elegaus n. sp., Ulrich, 485. 
fimbriata Ulrich, Ulrich, 485. 
foliata Ulrich, Ulrich, 485. 
occidentalis Ulrich, Ulrich, 485. 
pumila Ulrich, Ulrich, 485. 
triserialis Ulrich, Ulrich, 485. 
Pachymelania n. gen., White, 535. 
cleburni White, White, 535. 
chrysalis Meek, White, 535. 
chrysalloidea White, White, 535. 
? macilenta White, White, 535. 
turricula n. sp., White, 535. 
Palaeacis obtusa (Meek and Worthen), Keyes, 
257. 
Palaechinus 
burlingtonensis Meek and Worthen, 
Keyes, 260. 
gracilis Meek and Worthen, Keyes, 260. 
Palajmon, Beecher, 40. 
Palaeocampa ( ? ) obscura n. sp., Matthew, 317. 
Palseophonus arctus n. sp., Matthew, G. F., 
316. 
Paheoptysma n. gen., Scudder, 424. 
venosa n. sp., Scudder, 424. 
Palaeosyopinae, Osborn, 361. 
Pahootrochis, White, C. A., 536. 
Palecphora sp., Scudder, 424. 
Paleohillia arkansana n. gen. et sp., Knowl- 
ton, 275. 
Pantasuarus striatus, Marsh, 313. 
Pantolambda bathmodon Cope, Osborn and 
Earle, 362. 
Pantylus coi'codus n. sp., Cope, 93. 
Paracetus mediatlanticus n.sp., Cope, 92. 
Paradoxides harlani, James, 235. 
