exlii THE PALEONTOLOGY OF MINNESOTA. 
radiata, 827. 
Striata, 827, 
subcarinata, 827. 
Helicotoma, 1032, 934-936, 938, 994, 1025-1030, 
1033, 1035. 
declivis, 1086, 1033. 
eucharis, 1033. 
gorgonia, 1033. 
granosa, 1035, 1033. 
larvata, 994, 999, 1000, 1033. 
marginata, L036, 1029, 1033. 
misera, 1033. 
muricata, 1033. 
maresi, 1033. 
perstriata, 1033. 
planulata, 1033, 1026, 1029, 1034. 
var. robusta, 1033, 
planulatoides, 1034, 1033, 1035. 
proserpina, 1033. 
serotina, 1033. 
spinosa, 1033. 
subquadrata, 1034, 1029. 
tennesseensis, 1034, 1033-1036. 
tritonia, 1038. 
umbilicata, 1034, 1033, 1035. 
verticalis, 1035, 1033. 
Hercynella, 822, 1069. 
Heteromyaria, 485, 480. 
Heteropoda, $19, 813, 817, 844, 845. 
Hippa, 632. 
Hipponicharion, 632. 
Hisingeria, 1028, 1029. 
planorbis, 1028, 1029. 
Holomeris, 726. 
Holopea, 1064, 847, 1008, 1009, 1024, 1043, 1044, 
1057. 
ampla, 1065, 1066. 
appressa, 1UG5, 1067. 
cussina, 958. 
concinnula, 1066, 1067. 
excelsa, 1067, 1066. 
insignis, 1065, 1068. 
limata, 1063. 
nashvillensis, 1068. 
obliqua, 831, 1066, 1067. 
oxfordensis, 1068. 
paludiniformis, 1067, 1066. 
parvula, 1067. 
perundosa, 1067. 
pyrene, 1067, 1068. 
rotunda, 1066, 1067. 
similis, LOG6G, 1065. 
supraplana, 1068, 933. 
Homalonotus, 704. 
dekayi, 704. 
major, 704. 
vanuxemi, 704. 
Homolichas, 754, 
Homomyaria, 486. 
Hoplolichas, 747, 748, 753, 754. 
bicornis, 748. 
hyleeus, 754. 
proboscidea, 747, 748. 
robbinsi, 747, 498. 
tricuspidata, 747, 748. 
Hormoceras tenuifilum, 781. 
Hormotoma, 1012, 949, 959, 987, 1008, 1013, 1014, 
1018, 1019, 1021. 
bellicincta, 1017, 944, 987, 988, 1014, 1018, 1019. 
clavicula, 1014. 
gracilis, 1014, 959, 1015, 1016, 1020. 
var. angustata, 1015, 1016. 
goodhuensis, 1015, 1014, 1016. 
multivolvis, 1015, 1016. 
sublaxa, 1015, 1016. 
lebesconteia, 1014. 
major, 1018, 1019. 
salteri 1016, 959. 
var. canadensis, 1016. 
nitida, 1016, 
tennesseensis, 1016. 
subangulata, LOG, 1015, 1020. 
teretiformis, 1014. 
trentonensis, 1017, 1014, 1018, 1019. 
Hypostoma, 698. 
Tanthimide, 934. 
Llionia, 487. 
Illwnus, 714, 718, 719. 
americanus, 714*, 715, 716. 
arcturus, 718. 
crassicauda, 714-716, 718, 719*. 
herricki, 716, 718. 
indeterminatus, 716*. 
millert, 718, 720, 721, 
minnesotensis, 712. 
orbicaudatus, 722. 
ovatus, 716, 718. 
pterocepbalus, 718. 
taurus, 714, 
trentonensis, 718, 719. 
Inachus planorbis, 1028. 
sulcatus, 1028. 
Introduction, to chapter on Cephalopoda, 761; to 
chapter on Gastropoda, 813; to chapter on tril- 
obites, 695. 
Ischyrina, 613, 486, 608, 629. 
plicata, 613. 
winchelli, 613. 
Tschyrodonta, 521, 486, 523, 564. 
ovalis, 477*. 
Isoarca, 584. 
logant, 584. 
Tsochilina, 632, 643, 683. 
cylindrica, 687. 
fabacea, 647. 
labellosa, 637. 
minutissima, 646. 
rectangularis, 683. 
Isotelus, 700, 705, 706, 710, 713. 
canalis, 7O7*, 705. 
gigas, 701, 702 704, 706*, 708. 
gigas-maximus, 701, 704, 705*. 
iowensis, 704. 
jacobus, 706. 
maximus, 7O1, 702, 703*, 704, 706-708. 
megistos, 701, 706. 
suse, T08*, 
Isoxys, 632. 
