SCIENTIFIC INDEX. CXXXVll 
Crustacea, 629, 699; Chapter on Ostracoda, 629-693; 
Chapter on trilobites, 695-759. 
Crypheeus, 733. 
Crypteenia, 958, 960. 
Ctenobolbina, 673, 632, 656, 657, 667, 672, 674, 676, 
678. 
bispinosa, 674. 
Ciliata, 673, 654, 659, 674. 
var. emaciata, 673*. 
crassa, 675, 673, 674. 
duryi, 675. 
fulcrata, 674, 667, 675. 
informis, 674. 
minima, 674. 
papillosa, 674. 
punctata, 674. 
tumida, 674. 
Ctenodonta, 578, 483, 486, 533, 579, 580, 582-584, 
628, 847. 
abrupta, 593, 581. 
albertina, 598, 581, 595, 597, 599. 
alta, 602, 580, 581, 603. 
angela, 581. 
appressa, 580. 
astartiformis, 601, 579, 581, 602, 604. 
calvini, 596, 581, 597. 
carinata, 689, 581, 590. 
cingulata, 581. 
cireularis, 581. 
compressa, 600, 581-583, 591, 602, 603. 
contracta, 587, 581, 588, 590. 
crandalli, 580. 
cuneiformis, 687, 580, 586. 
danvillensis, 581. 
donaciformis, 581. 
dubia, 581. 
fecunda, 595, 581, 582, 596, 598, 599. 
filistriata, 599*, 581, 597, 598. 
gibberula, 5687, 581, 588-590, 592, 599%. 
gibberula group, 581, 587. 
gibbosa, 581. 
hamburgensis, 605, 606. 
hartsvillensis, 581. 
hilli, 581. 
intermedia, GO1, 581, 602, 607. 
iphigenia, 580. 
levata, 590, 581, 593, 595, 628. 
levata group, 581, 582, 592. 
logani, 583, 581, 584. 
logani group, 581, 591. 
longa, 590, 581. 
madisonensis, 597, 581, 598. 
Medialis, 593, 581, 594. 
mundula, 597, 581. 
nasuta, 584, 578, 580, 583-587, 592. 
var. robusta, 585, 580. 
nasuta group, 580, 583, 584. 
Nnitida, 592, 581, 593-595, 598, 599. 
nuculiformis, 582, 581. 
obliqua, 604, 581. 
ovata, 581. 
oviformis, 586, 580. 
pectunculoides, 581. 
pectunculoides group, 581. 
perminuta, 581. 
planodorsata, 589, 581, 590, 591, 616. 
pulchella, 581. 
recurva, 603, 578, 583, 602, 604. 
recurva group, 581, 582, 600. 
regia, 585, 580. 
retrosa, 581. 
scofieldi, 595, 581, 591, 595. 
similis, 604, 603. 
simulatrix, GOO, 581, 596. 
socialis, 594, 581, 591, 593, 596, 606. 
Subnasuta, 585, 580, 586, 587, 591. 
subrotunda, 583, 581. 
tennesseensis, 583, 581. 
tumida, 597, 581. 
Cucullella, 606. 
Cuneamya, 620, 478, 481*, 488, 487, 517, 621, 625 
627. 
coriformis, 622, 621, 623. 
curta, 477*, 621. 
miamiensis, 621, 623. 
oblonga, 6238. 
scapha, 623. 
sulcodorsata, 625. 
truncatula, 622, 620, 623. 
Cuttle-fish, 761. 
Cybele, 742, 743. 
bellata, 742*. 
mira, 743. ‘ 
revalensis, 743. 
winchelli, 742*, 743. 
Cycloconcha, 617, 483, 487. 
Cycloconchids, 617, 487, 628. > 
Cyclonema, 1056, 847, 939, 1043-1047, 1054, 1857- 
1059, 1061, 1063, 1064. 
adstrictum, 1064. 
bilix, 1058, 1056-1059. 
var. Sonicum, 1059. 
fluctuatum, 1059, 1057. 
lata, 1059. 
cancellatum, 1064, 1058. 
carinatum, 1057. 
cincinnatiense, 1060. 
delicatulum, 1064. 
Sluctuatum, 1058. 
gracile, 1062, 1057, 1064. 
var. Striatum, 1062. 
humerosum, 1061. 
inflatum, 1060, 1057. 
limatum, 1063. 
mediale, 1059, 1056-1062. 
nodulosum, 1857. 
percarinatum, 1057. 
pyramidatum, 106%. 
semicarinatum, 1055, 1057. 
simulans, 1061, 1062. 
subleve, 1062. 
transversum, 1062, 939, 1047. 
varicosum, 1060, 1046. 
ventricosa, 1060. 
Cyclora, 847. 
Cymatonota, 628, 485, 501. 
Cyphaspis, 759. 
brevimarginata, 759. 
