CXXXVi 
Caudal spine, 698. 
Caularops canadensis, 1024. 
lituiformis, 1023. 
Cephalon, 696. 
Cephalopoda, 475; chapter on, 761-812. 
Ceratolichus, 753. 
dracon, 753. 
gryps, 753. 
Ceratella, 657. 
chambersi, 659. 
Ceratopsis, 675, 657, 676, 678. 
chambersi, 676, 654, 657. 
var. robusta, 67 7*, 676. 
hastata, 676. 
intermedia, 676. 
oculifera, 676. 
Cerauride, 734. 
Ceraurus, 738, 734, 736, 737. 
american species of, note on classification, 736. 
apollo, 738. 
glaucus, 737, 738. 
icarus, 737, 738. 
insignis, 738. 
mercurius, 738. 
niagarensis, 738. 
numinitor, 737, 738. 
nuperus, 738. 
perforator, 737, 738. 
pleurexanthemus, 734, 736, 738. 
polydorus, 738. 
pompilus, 738. 
prolificus, 7387, 738. 
rarus, 738. 
robusta, 738. 
salteri, 738. 
satyrus, 737, 738. 
scofieldi, 738. 
sub-generic classification, 736. 
tarquinius, 738. 
trentonensis, 738. 
Cerithida, 947. 
Cephalopoda, 475. 
Chenocardia, 485. 
Chienocardiide, 485, 
Chenodomus, 628. 
typicalis, 477*. 
Chenomya, 487. 
Chasmops, 7382-734. 
troosti, 732, 734. 
Cheeks of trilobites, 697. 
Cheirurus, 736, 
Chelotia, 949, 960. 
Cimitaria, 619, 487. 
Classification, of Gastropoda, 817; of Lamelli- 
branchiata, 484; of Paleozoic Ostracoda, 631. 
Clathrospira, 1005, 954, 957, 1001, 1006, 1007. 
conica, 1008, 1007. 
convexa, 1007. 
subconica, 1006, 1007, 1008. 
Clavicle, 480. 
Oleidophorus major, 611. 
Clidophorus, 606, 486, 478, 479*, 480, 483, 582, 612, 
628, 847. 
consuetus, 606. 
cuneatus, 607. 
THE PALEONTOLOGY OF MINNESOTA. 
fabula, 608, 607. 
ellipticus, 607. 
elongatus, 607. 
major, 611. 
neglectus, 607. 
planulatus, 607. 
Clinoceras, 797, 764, 778, 804. 
dens, 797. 
mumieforme, 797, 812. 
Clinopistha, 478, 486. 
Clionychia, 493, 483, 485, 490, 491, 494, 495, 498. 
erecta, 496, 497. 
lamellosa, 494, 495-497. 
nitida, 495, 496. 
rhomboidea, 496. 
undata, 497, 491. 
Clisiospira, 816. 
Ccelocaulus, 1019, 959, 1020. 
barroisi, 1019, 1020. 
davidsoni, 959, 1020. 
neglectus, 1020, 1019. 
cehlerti, 1020. 
procerus, 1020. 
Colpoceras, 777. 
Colpomya, 522, 485, 523, 524. 
constricta, 523*. 
demissa, 524, 523, 525. 
Columella of Gastropoda, 815. 
Conchopeltis, 823, 839. 
alternata, 823*, 839. 
minnesotensis, 838, 823, 839. 
obtusa, 841, 
Conocardiide, 487. 
Conocardium, 487 
Conolichas, 749, 753, 754. 
cornutus, 749%, 752, 754. 
eriopis, 7538, 754. 
hispidus, 753, 754. 
pustulosus, 754, 
Conradella, 904, 850, $51, 858, 859, 866, 883, 886, 
898, 905, 906. ‘ 
bellula, 910, 852, 911. 
compressa, 908, 852, 906, 907. 
dyeri, 9O9, 852, 906, 908-911. 
var. cellulosa, 910, 852. 
elegans, 911, 852, 910, 912. 
fimbriata, 907, 852. 
grandis, 908, 852, 909. 
imbricata, 911, 852, 912. 
obliqua, 906, 852, 907. 
pannosa, 852, 906. 
similis, 906, 852, 907. 
triangularis, 9O8, 852, 909, 911, 912. 
Cornura, 733. 
Corycephalus, 733. 
Cranidium, 697. 
Cranoceras, 803. 
Craspedostoma, 1045, 1043. 
Crassatellida, 608. 
Crenipecten, 485. 
Cretaceous Ostracoda, 631. 
Crotalocephalus, 737, 738. 
niagarensis, 737, 738. 
insignis, 738. 
