SCIENTIFIC INDEX. 



Ixiii 



primordialis, 18, 9, 22. 

 Dialapetaleae, 8. 5. 

 Diamesopora, 33O, 107, 109, 331. 



communis, 331. 



trentonensis, 33O. 



vaupeli, 331. 



Diaphragms, 98, 104; perforated, 98. 

 Diastopora, ISO, 115, 116, 121. 

 Diastoporella, ISO. 

 Diastoporina, 121, 107, 109. 



flabellata, 122, 133. 

 Dichotrypa, 106, 110, 145. 

 Dicotyledons, evolution, 5. 

 Dicranopora, 106, 135, 147, 163, 187. 



trentonensis, 135. 

 Dlctyocrinus, 64, 61. 

 Dictyospongidas, 75. 

 Dignomia cincinnatiensis, 351. 

 Dinobolus, 356, 354, 357. 



brimonti, 357. 



parvus, 356*, 354, 357. 



schmidti, 357. 

 Dinorthis, 42O, 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. sweeney i, 426, 427. 



porcata, 432. 



proavita, 431, 432. 



retrorsa, 432. 



subquadrata, 428, 423, 432. 

 Diospyrineae, 5. 

 Diospyrus, 21, 5, 8. 



anceps, 17. 



pseudo-anceps, 17, 9, 22. 



species, 22. 

 Diploclema, 107, 109, 121, 123. 



sparsum, 109, 123. 



trentonense, 123. 

 Diplograptidas, 81. 

 Diplograptus, 366. 



pristis, 81*. 



putillus, 82*. 

 Diplopora, 106, 110, 111. 

 Diplotrypa, 285, 107, 257, 257, 262, 276, 290, 303. 



dubia, 262. 



infida, 258, 257. 



limitaris, 286*. 



milieri, 262. 



neglecta, 287*. 



patella, 257. 



petropolitana, 285, 286. 



quebecensis, 259, 257. 



regularis, 251. 



westoni, 286. 



whiteavesi, 246, 250, 257. 



Diplotrypidse, 285, 107, 109, 276, 289, 290, 302, 303. 

 Discina, 364. 



circe, 364, 366. 



concordensis, 365. 



pelopea, 365. 



striata, 364. 



truncata, 364. 

 Discinidse, 363. 

 Discinisca, 346, 364. 



laevis, 346. 



strigata, 346. 

 Discocavea, 121. 

 Discorbina ammonoides, 44. 



marginata, 42. 



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. 



Entalophoridas, 107. 



Entoprocta, 105. . 



Eocene, flora of lower, 4; in Wisconsin, 54. 



Eolian sand, 27, 29. 



Equisetaceae, 2, 1. 



Equisetum, 2-4. 



Ericaceae, 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, 187, 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 flbrosa, 247. 



lycoperdon, 246. 



lycopodites, 246, 247. 

 Favositidae, 84. 

 Favositoids, 53. 



Fenestella, 106, 103, 109, 111, 212, 215. 

 Fenestellidae, 106, 99, 100, 109, 110, 208, 209, 214. 



