226 INDEX TO NORTH AMERICAN GEOLOGY, PALEONTOLOGY, [hull. 189. 
Paleontology— Continued. 
6?< nera and species described— Continued. 
Hyrachyus agrarius Leidy, Osborn and Wort- 
man, 4192. 
Hyracotherium Owen, Wortrnan, 6489. 
craspedotum Cope, Wortman, 6489. 
cristatum n. sp., Wortman, 6489. 
index Cope, Wortman, 6489. 
montanum n. sp., Wortman, 6489. 
tapirinum Cope, Wortman, 6489. 
vasacciense Cope, Wortman, 6489. 
( Pliolophus) cristonense Cope, Wortman, 
6489. 
Hysterites cordaitis Gr.'Ey., White, 6050. 
Icanodus ? limitaris, Hay, 2381. 
Ichthyocrinus Conrad, Weller, 6002. 
burlingtonensis, Whitfield, 6098. 
elarkensis n. sp., Miller and Gurley, 3997c. 
greenii n. sp., Miller, 3995. 
spinosulus n. sp., Miller and Gurley, 3997c. 
subangularis Hall, Weller, 6002. 
Ichthyodectes anaides Cope, Crook, 1147. 
cruentus n. sp., Hay, 2380. 
polymicrodus Cope, Crook, 1148. 
Iehthyodorulite, Case, 766. 
Ichthyorachis, Simpson, 4983. 
Ichthyornis dispar Marsh, Williston, 6245. 
Icthyosaurus, Case, 1100. 
Ictops bullatus n. sp., Matthew, 3804. 
Idiocrinus elongatus W. and Sp. n. gen. et sp., 
Wachsmuth and Springer, 5765. 
ventricosus W. and Sp. n. sp., Wachsmuth 
and Springer, 5765. 
Idiotrypa, Simpson, 4983. 
Idonearca (?) depressa White, Herrick and 
Johnson, 2465. 
Igoceras Hall, Keyes, 3062. 
capulus Hall, Keyes, 3062. 
fissurella (Hall), Keyes, 3062. 
pabulocrinus (Owen), Keyes, 3062. 
pyramidatum (Hall), Keyes, 3062. 
quincyense (McChesney), Keyes, 3062. 
Iguanavus teres n. sp., Marsh, 3672. 
Iguanodon, Case, 768. 
Ilex ? affinis (?) Lx., Hollick, 2708. 
armata n. sp., Lesquereux, 3470. 
borealis Heer, Lesquereux, 3470. 
dakotensis n. sp. Lesquereux, 3470. 
(?) elongata n. sp., Newberry, 4080. 
masoni n. sp., Lesquereux, 3470. 
(?) ovata n. sp., Newberry, 4080. 
papillosa n. sp., Lesquereux, 3470. 
rigida n. sp., Kirchner, 3187. 
scudderi n. sp., Lesquereux, 3470. 
sp., Hollick, 2708. 
Ilionia galtensis Whiteaves, Whiteaves, 6080. 
Illsenus aboynensis n. sp., Whiteaves, 6080. 
(?) ambiguus, Foreste, 1835. 
americanus Billings 1859, Clarke, 952. 
danielsi n. sp.. Miller and Gurley, 3997a. 
cf. indeterminatus Walcott, Clarke, 952. 
insignis, Foerste, 1835. 
insignis ? Hall, Keyes, 3061. 
madisonianus, Foerste, 1835. 
taurus, Whitfield, 6102. 
Ilyanassa granifera Conrad, Dall, 1259. 
irrorata Conrad, Dall, 1259. 
Paleontology— Continued. 
Genera and species described— Continued. 
Ilyanassa isogramma n. sp., Dall, 1259. 
(porcina var.?) schizopyga, Dall, 1259. 
porcina Say, Dall, 1259. 
(Paranassa) arata Say, Dall, 1259. 
Ilyocypris oblonga n. sp., Jones. T. R., 2935. 
Ilyodes (?) attenuatus n. sp., Matthew, G. F., 
3759. 
Incolaria securiformis n. gen. et sp., Herzer, 
2500. 
Indianocrinusn. gen., Miller and Gurley, 3998. 
punctatus n. sp., Miller and Gurley, 3998. 
Indrodon malaris Cope, Osborn and Earlo, 
4191. 
Ingra cretacea n. sp., Lesquereux, 3470. 
Inocaulis, James, 2881. 
canadensis n. sp., Whiteaves, 6087. 
Inoceramusacuteplieatus n. sp., Stanton, 5206. 
altus Meek, Logan, 3554. 
barabihi Mort., Harris, 2315. 
brownii Cragin, Logan, 3554. 
comancheana n. sp., Cragin, 1118. 
comancheana, Stanton, 5197. 
concentricus n. sp., Logan, 3554. 
crihsii var. barabina Morton, Logan, 3554. 
cumminsi n. sp., Cragin, 1118. 
deformis Meek, Herrick and Johnson, 
2465. 
deformis Meek, Logan, 3554. 
deformis Meek, Stanton, 5191. 
digitatus (Sowerby), Schmidt, Whiteaves, 
6085. 
dimidius White, Logan, 3554. 
dimidius White, Stanton, 5191. 
exogyroides M. and H., Logan, 3554. 
exogyroides M. and H., Stanton, 5191. 
flaccidus White, Logan, 3554. 
flaccidus White, Stanton, 5191. 
fragilis H. and M., Herrick and Johnson, 
2465. 
fragilis M. and H., Logan, 3554. 
fragilis H. and M., Stanton, 5191. 
gilberti White, Herrick, and Johnson, 2465. 
gilbertii White, Logan, 3554. 
gilberti White, Stanton, 5191. 
incurvus M. and H., Logan, 3554. 
labiatus Schloth, Herrick and Johnson, 
2465. 
labiatus Schlotheim, Logan, 3554. 
labiatus Schlotheim, Stanton, 5191. 
nultistriatus n. sp., Cragin, 1115. 
munsoni n. sp., Cragin, 1118. 
ovatus n. sp., Stanton, 5199. 
pennatusn. sp., Logan, 3554. 
platinus n. sp., Logan, 3554. 
sagensis var. nebrascensis Owen, Logan, 
3554. 
simpsonii Meek, Logan, 3554. 
simpsoni Meek, Stanton, 5191. 
subconvexus n. sp., Logan, 3554. 
subtriangulatus n. sp., Logan, 3554. 
subundatus Meek, Whiteaves, 6084. 
tenuirostratus M. and H., Logan, 3554. 
tenuirostratus M. and H., Stanton, 5191. 
truncatus n. sp., Logan, 3554. 
umbonatus M. and H., Logan, 3554. 
