exlvi THE PALEONTOLOGY OF MINNESOTA. 
versaillensis, 521*. 
Modiolopside, 500, 485, 501, 502, 517, 522, 523, 525, 
526, 5380-532, 534, 
Modiomorpha, 503, 485, 501, 504, 512, 521. 
concentrica, 521*, 503, 504. 
Mogulia, 856, 855, 868, 915. 
regularis, 856. 
Mollusca, 485, 475, 813, 817. 
Monomyaria, 485, 480. 
Monoptera, 485. 
Monorachus, 729, 732, 733. 
Monorakos, 729. 
Monotis, 485. 
Moorea, 681, 632, 683. 
apgularis, 682, 681. 
bicornuta, 681. 
granosa, 681. 
kirkbyi, 681. 
obesa, 681. 
perplexa, 683, 681. 
punctata, 682, 669. 
smithii, 681. 
tenuis, 681. 
Mourlonia, 955. 
Multivalvia, 817. 
Murchisonia, 959, 944, 950, 960, 961, 988, 1010, 1012, 
1014, 1019, 1021, 1022, 1075. 
acred, 959, 
ada, 959. 
adelina, 1021, 
agilis, 1014. 
alexandra, 946, 945. 
angulata, 1018. 
angustata, 1014. 
anna, 1014. 
arenaria, 1009. 
artemesia, 1013, 1014. 
attenuata, 1013, 1014, 1022. 
augustina, 987, 988. 
bachelieri, 1013. 
bicincta, 964, 951, 965, 984, 1016. 
bivittata, 1020, 
bowdeni, 986. 
boylei, 959. 
cancellata, 963. 
cassandra, 1011. 
cavd, 959. 
chalmasi, 1013, 
cingulata, 1013, 1014. 
clavicula, 1014. 
cochleata, 963, 1013. 
compressa, 1020. 
constricta, 959. 
coronata, 960. 
davidsoni, 959. 
desiderata, 949, 1014. 
desiderata section, 1013. 
doubtful species of, 959. 
egregia, 1014. 
extenuata, 1013. 
gracileus, 1014, 1015. 
gracilis, 659, 1014, 1016, 1022. 
gyrgoma, 977. 
hebe, 1014. 
helicteres, 968, 951, 970, 971. 
helicteres et tricarinata, 971. : 
hyale, 1009. ; 
imbricata, 963. 
laphami, 959. 
larcomi, 1013, 1022. 
lebescontet, 1014. 
leda, 1014. 
linearis, 1020. 
logani, 1020. 
longispira, 1020. 
maia, 949, 1014. 
major, 1017, 987, 1018, 1019. 
micula, 1013, 1021. 
milleri, 964, 970. 
missisquot, 1021. 
moniliformis, 1014, 1013. 
multigruma, 978. 
munda, 968. 
nana, 1022. 
obtusangula, 1014, 1013. 
pagoda, 1022. 
perangulata, 972. 
procris, 1014. 
quadricarinata, 1022. 
serrulata, 960, 951, 969, 970. 
simulatrix, 1014. 
soluta, 963. 
subplicata, 1014. 
subfusiformis, 1077. 
sumnerensis, 978. 
tenuis, 1022. 
teretiformis, 1014, 1018. 
tortuosa, 963. 
tricarinata, 968, 970, 972. 
tricincta, 1022. 
tropidophora, 963. 
turricula, 1021. 
turritella, 1022. 
turritiformis, 1020. 
ventricosa, 946, 945, 979, 
vermicula, 1022. 
worthenana, 955. 
Muscular impressions, 480. 
Myalina, 501, 485. 
Myidee, 608. 
Myoconcha, 501, 502. 
Mytilarca, 494, 485, 489. 
Mytilidee, 485, 489, 501, 502. 
Mytilops, 485. 
Mytilus, 501, 502. 
Nacella, 820, 825. 
Nanno, 769, 765, 766, 772, 773, 777, 812. 
aulema, 770, 772, 812. 
belemnitiforme, 771, 772, 774. 
Nautiloidea, 767, 761, 762. 
Nautilus, 773. 
pompilius, 762*, 761. 
Neilo, 583. 
Nematopora delicatula, 912. 
Nieszkowskia, 737, 786. a 
glaucus, 738. 
