1432 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Page. 



Cyclospira 1418 



Cyclostomiceras 1423 



Cylindroccelia 1408 



Cylindrohelium 1408 



Cymatonota 1420 



Cyphaspis 1424 



Cyphocrintis 1412 



Cyphotrypa 1415 



Cypricardinia 1420 



Cypridina 1426 



Cyrtactinoceras 1433 



Cyrtendoceras 1422 



Cytheropsis 1425 



Cyrtia 1419 



Cyrtina 1419 



Cyrtoceras 1423 



Cyrtocerina 1422 



Cyrtodonta 1419 



Cyrtograptus 1410 



Cyrtolites 1420 



Cyrtolitina 1420 



Cyrtorizoceras 1423 



Cyrtospira 1421 



Cystaster 1412 



Cystiphorolites 1408 



Cystiphyllum 1408 



Cystocrinus 1412 



Cystostylus 1408 



Cytherella 1425 



Cytherellina 1425 



Cytherodon 1419 



Cytheropsis 1425 



Dactylophycus 1427 



Daedalus 1411 



Dalmanella 1417 



Dalmanites : 1425 



Dania 1409 



Dawsonia 1410 



Dawsonoceras 1422 



Deiphon 1425 



Deiroceras 1423 



Dekayella 1415 



Dekayia 1415 



Deltacrinus 1413 



Delthyris 1419 



Deltoceras 1422 



Dendroclonella 1407 



Dendrocrinus 1414 



Dendrocystites 1411 



Dendrograptus 1410 



Deocrinus 1412 



Dermatostroma 1409 



Desmograptus 1410 



Page. 



Diabolocrinus 1412 



Diamesopora 1416 



Dianulites 1415 



Diaphorostoma*. 1421 



Diastoporina 1415 



Dicellograptus 1410 



Dicellomus 1416 



Dichograptus 1410 



Dicranella 1425 



DicranograptuH 1410 



Dicranopeltis 1424 



Dicranopora 1416 



Dictyonella 1418 



Dictyonema 1410 



Dictyorhabdus 1426 



Dictyostroma 1409 



Didymograptus 1410 



Dikelocephalus 1424 



Dilobella 1425 



Dimerocrinus 1412 



Dimorphograptus 1410 



Dinobolus 1417 



Dinorthis (subgenera Plsesiomys 



and Valcourea) 1417 



Dionide 1424 



Diorychopora 1409 



Diphyphyllum 1408 



Diploclema 1415 



Diplograptus (siibgenus Glypto- 



graptus) 1410 



Diplostenopora 1416 



Diplotrypa 1416 



Discoceras 1422 



Discophycus 1427 



Discophyllum 1427 



Discosorus 1423 



Discotrypa 1416 



Distacodus 1426 



Ditcecholasma 1408 



Dolichometopus 1425 



Dolichopterus 1426 



Drepanella 1425 



Drepanodus 1426 



Drepanopterus 1426 



Duncanella 1408 



Dyeria 1421 



Dystactophycus 1427 



Dystactospongia 1407 



Eatonia 1418 



Eccyliomphalus (subgeuus Ortho- 



stoma) 1421 



Eccyliopterus 1421 



Echinognathus 1426 



