clii PALEONTOLOGY OF MINNESOTA. 
Straparollus, 1024. 
quebecensis, 1023. 
Streblopteria, 485. 
Strophomena deltoidea, 746, 
subtenta, 736. 
Strophostylus, 1063, 1043, 1044, 1056-1058, 1064. 
cyclostomus, 1063. 
elegans, 1063. 
textilis, LOG4, 1057, 1063. 
Strepula, 632, 677. 
lunatifera, 680, 
quadrilirata, 679. 
Subgeneric classification of Ceraurus, 736. 
Subulitacea, 1069. 
Subulites, 1069, 1070, 1071, 1073-1075, 1079. 
abreviatus, 1070. 
attenuatus, 1070. 
beloitensis, 1072, 1073. 
brevis, 1070. 
calciferus, 1070, 1074. 
canadensis, 1071, 1072. 
compactus, 1070. 
conradi, 1071, 1072. 
daphne, 1070, 1074. 
directus, 1070. 
dixonensis, 1072, 1073. 
gracilis, 1070. 
inflatus, 1075, 1070. 
nanus, 1072, 1070. 
notatus, 1070, 1074. 
obesus, 1070, 1074. 
parvulus, 1070. 
parvus, 1072. 
pergracilis, 1072, 1073. 
planilateralis, 1079. 
priscus, 1070. 
psyche, 1070, 1074. 
regularis, LO72, 1070, 1073. 
richardsoni, 1070. 
sp. undet., 1073, 1070. 
terebriformis, 1070. 
ventricosus, 1070, 1073. 
Subulitide, 1069. 
Sulcuna, 632. 
Suture, of Cephalopoda, 761; of Gastropoda, 815; 
facial of trilobites, 697. 
Synopsis of generic groups of Pleurotomarid, 951. 
Synphoria, 733. 
Taconic Ostracoda, 631. 
Tenoceratide, 811. 
Talantodiscus, 960, 
Technophorida, 612, 628. 
Technophorus, 612, 486, 608, 613, 614, 628. 
divaricatus, 616. 
extenuatus, 614, 611*, 613. 
faberi, 613. 
filistriatus, 615. 
punctostriatus, 615, 613, 616, 
subacutus, 614, 613. 
Tectibranchiata, $18. 
Tecturide, 837. 
Teeth of Lamellibranchiata, 480, 479. 
Tellimya, 578. 
Tellinomya, 578, 478, 479, 486, 579, 582. 
alta, 602. 
compressa, 600. 
curta, 582. 
dubia, 591. 
fecunda, 595. 
hamburgensis, 605. 
intermedia, 601. 
lepida, 604. 2 
levata, 599. 
longa, 590. 
nasutd, 584, 578, 579, 585, 591. 
obliqua, 604. 
planodorsata, 589. 
recurva, 603, 
similis, 604. 
ventricosa, 587, 588, 
Terataspis, 753. 
grandis, 753. 
Terminology, Lamellibranchiata, 477; trilobites, 
696. 
Tertiary Ostracoda, 631. 
Tetrabranchiata, 767. 761. 
Tetradella, 677, 630, 632, 657, 669, 675, 676-679. 
chambersi, 676. 
lunatifera, 680*. 
quadrilirata, 679, 669, 675, 677, 680. 
var. simplex, 680. 
subquadrata, 677, 679. 
Tetranota, 875, 849, 850, 856, 857, 876, 877, 882, 883, 
886, 896, 923. 
bidorsata, $77, 849, 875-883, 896, 923. 
var. minor, $78. 
macra, 879, 849, 875, 877. 
obsoleta, 88O, 849, 875-877, 881. 
sexcarinata, 878, 849, 875, 877-881. 
wisconsinensis, 881, 849, 875-877, 923. 
Thaleops, 716, 718. 
ovata, 716, 714, 717*, 718*. 
Thecosomata, $18. 
Thlipsura, 632. 
Thlipsuride, 632. 
Thorax of trilobites, 697, 696. 
Thysanopeltis, 725. 
Tremanotus, 851, 850, 858, 883, 885, 897, 898, 899, 
903, 905, 1045. 
alpheus, 851. 
angustata, 851. 
buelli, 900. 
chicagoensis, 851, 
compressus, 851. 
longitudinalis, 851, 899. 
maideni, 851. 
profundus, 851. 
trigonostoma, 851. 
Trepospira, 957, 958, 992, 993, 1081*. 
convexa, 1081*. 
illinoisensis, 1081*. 
spherulata, 1081*. 
Triassic Ostracoda, 631. 
Trigoniidx, 608, 486. 
Trilobites, chapter on Lower Silurian, 695-759. 
Trinucleus, 752. 
