Ixii THE PALEONTOLOGY OF MINNESOTA 
Minn., 23-52; flora of lower, 2; flora of middle, 1; 
iron ores, 54; other fossils from Minn., 53-54; 
plants known to occur in Minn., 22. 
Crisina, 121. 
Crisinella, 106. 
Cryptonella, 472. 
Crytonelline, 471, 472. 
Cryptostomata, 124, 98, 100, 104, 105, 108-110, 208. 
Ctenostomata, 112, 105, 107, 109-111, 114. 
Cupuliferea, 5. 
Cyathophylloids, 53. 
Cyathophyllum profundum, 88. 
Cycadee, 6, 2-4, 7. 
Cyclopora, 106, 110. 
Cycloporella, 106. 
Cyclospira, 469, 470, 471. 
bisuleata, 470, 334. 
Cyclostomata, 115, 107-111, 187, 190, 208, 209, 214. 
Cylindrocelia, 77. 
covingtonensis, 78. 
endoceroidea, 77, 78. 
minnesotensis, 78, 
Cystiphragms, 98, 104. 
Cystodictya, 106, 110, 111, 128, 145. 
gilberti, 128. 
Cystodictyonids, 106, 110, 148, 214. 
Cystopora, T07, 110. 
Daikaulia, 358. 
Dakota group, flora, 3, 1-6. 
Dalmanella, 439, 441, 458. 
amoena, 453. 
corpulenta, 446, 
emacerata, 445. 
gibbosa, 451. 
hamburgensis, 440. 
meeki, 446. 
stonensis, 453. 
subequata, 446, 421. 
var. circularis, 452, 448, 453. 
var. conradi, 449, 448. 
var. gibbosa, 451, 448, 450, 452. 
var. perveta, 450, 448. 
testudinaria, 441. 
var. emacerata, 445. 
var. meeki, 445. 
Dayia, 470. 
Defrancia, 121. 
Dekayella, 269, 107, 215, 223, 267, 270, 272, 274, 288° 
echinata, 275. 
obscura, 269, 273. 
prenuntia, 270, 215, 271, 273. 
var. echinata, 271, 269, 272, 273. 
var. multipora, 272, 273. 
var. nevigera, 271, 272, 273. 
var. Simplex, 271, 269, 272, 273, 275. 
ulrichi, 273, 215. 
Dekayia, 274, 98, 107, 110, 269, 270, 272, 273, 275. 
aspera, 274, 269. 
trentonensis, 274, 
Delthyris, 454. 
brachynota, 455, 
lyna, 455, 
Dentalina, 36. 
acuminata, 7. 
acus, 37. 
acuticauda, 37. 
adunca, 37. 
equalis, 38. 
ahercula, 38. 
annulata, 37. 
antenna, 37. 
badenensis, 37. 
badensis, 37. 
boneana, 37, 38 
brevis, 37. 
budensis, 38. 
carinata, 36. 
chrysalina, 37. 
cingulata, 37. 
colligata, 37. 
communis, 36, 37, 38, 52. 
var. pauperata, 38, 
commutata, 37. 
consobrina, 37, 38 
deflexa, 38, 
elegans, 37. 
emaciuta, 37. 
Fasciata, 38, 
ferstliana, 37. 
fusiformis, 38. 
glandulifera, 38. 
gracilis, 36, 37, 
haidingeri, 37. 
indifferens, 38. 
inermis, 37. 
inornata, 87, 38. 
inorta, 38. 
intermedia, 37. 
korynephora, 38. 
linearis, 37, 38. 
lorneiana, 36. 
megalopolitana, 37. 
mutabilis, 37. 
nepos, 37. 
nitens, 37. 
nodosa, 36, 37. 
obtusa, 37. 
pauperata, 37. 
perseripta, 37. 
perversa, 37. 
plebeja, 37. 
prelonga, 37. 
pugiunculus, 37. 
punctata, 37. 
reusst, 37. 
scripta, 37. 
subnodosa, 33. 
tenuicollis, 37. 
transmontana, 38. 
verneuilli, 37, 
Devonian, Bryozoa, 110; Cordaites in lower, 2; 
ferns, 6; flora of upper, 2; Stomatopora and 
Proboscina, 121. 
Dewalquea, 8, 18. 
gelindensis, 18. 
greenlandica, 19. 
