SCIENTIFIC INDEX. 
primordialis, 18, 9, 22. 
Dialapetalex, 8. 5. 
Diamesopora, 330, 107, 109, 331. 
communis, 331. 
trentonensis, 330. 
vaupeli, 331. 
Diaphragms, 98, 104; perforated, 98. 
Diastopora, 120, 115, 116, 121. 
Diastoporella, 120, 
Diastoporina, 121, 107, 109. 
flabellata, 122, 133. 
Dichotrypa, 106, 110, 145. 
Dicotyledons, evolution, 5. 
Dicranopora, 106, 135, 147, 163, 187. 
trentonensis, 135, 
Dictyocrinus, 64, 61. 
Dictyospongidax, 75. 
Dignomia cincinnatiensis, 351. 
Dinobolus, 356, 354, 357. 
brimonti, 357. 
parvus, 356%, 354, 357. 
schmidti, 357. 
Dinorthis, 420, 398, 418, 421, 423, 428, 432. 
deflecta, 422, 421-424. 
epigenia, 431. 
meedsi, 427, 423. 
var. germana, 428, 423. 
pectinella, 424, 421-423, 426, 427. 
var. sweeneyi, 426, 427. 
porcata, 432. 
proavita, 431, 432. 
retrorsa, 432. 
subquadrata, 428, 423, 432. 
Diospyrinew, 5. 
Diospyrus, 21, 5, 8. 
anceps, 17. 
pseudo-anceps, 17, 9, 22. 
species, 22. 
Diploclema, 107, 109, 121, 123. 
sparsum, 109, 123. 
trentonense, 123. 
Diplograptide, 81. 
Diplograptus, 366. 
pristis, SL*. 
putillus, 82*, 
Diplopora, 106, 110, 111. 
Diplotrypa, 285, 107, 257, 257, 262, 276, 290, 303, 
dubia, 262. 
infida, 258, 257. 
limitaris, 286*, 
milleri, 262. 
neglecta, 287*. 
patella, 257. 
petropolitana, 285, 286. 
quebecensis, 259, 257. 
regularis, 257, 
westoni, 286. 
whiteavest, 246, 250, 257. 
Diplotrypid&, 285, 107, 109, 276, 289, 290, 302, 303. 
Discina, 364. 
circe, 364, 366. 
concordensis, 365. 
eloped, 365. 
striata, 364. 
truncata, 364. 
Discinidsx, 363. 
Discinisca, 346, 364. 
levis, 346. 
strigata, 346. 
Discocavea, 121. 
Discorbina ammonoides, 44. 
marginata, £2. 
saccharina, 45. 
Discotrypa, 107. 
Dissepiments, 99. 
Distribution, Bachiopoda, 333; Bryozoa, 108; Cre- 
taceous plants, 9, 7. 
Dorsal (brachial) valve, 335. 
Drymotrypa, 106, 109, 207, 209. 
dichotoma, 208. 
Echinodermata, 51. 
Ectoprocta, 105. 
Endoceras, 77, 320. 
Entalophora, 121-123. 
Entalophorid, 107. 
Entoprocta, 108. 
Eocene, flora of lower, 4; in Wisconsin, 54. 
Kolian sand,.27, 29. 
Equisetaceex, 2, 1. 
Equisetum, 2-4. 
Hricaceex, 5. 
Eridopora, 107, 110. 
Eridotrypa, 264, 185, 215, 235, 267. 
exigua, 266. 
mutabilis, 265, 215, 264, 266. 
var. minor, 266, 267. 
Escharopora, 167, 162-165, 173, 176, 204, 266. 
acuminata, 167, 170. 
angularis, 168, 167, 170. 
briareus, 167. 
confluens, 171, 162, 167, 170, 172, 173. 
falciformis, 168, 167, 170. 
hilli, 167. 
libana, 167. 
limitaris, 172*, 162, 171, 173, 175. 
maculata, 167, 176. 
pavonia, 167. 
ramosa, 171, 167, 172. 
recta, 167, 164, 165, 170. 
subrecta, 168, 165, 167, 170, 171. 
Eurydictya, 138, 106, 141, 145, 147. 
calhounensis, 140. 
montifera, 138, 140. 
multipora, 139, 138, 140, 141, 147, 332. 
Euspilopora, 106, 110. 
Evactinopora, 106, 110. 
Fagus, 5. 
Favistella stellata, 85, 86. 
Favosites fibrosa, 247. 
lycoperdon, 246. 
lycopodites, 246, 247. 
Favositida, 84. 
Favositoids, 53. 
Fenestella, 106, 103, 109, 111, 212, 215. 
Fenestellide, 106, 99, 100, 109, 110, 208, 209, 214. 
xi 
