exliv 
modesta, 1081. 
mundula, 999, 994, 1002. 
numeria, 1000, 994, 999. 
obtusa, 997. 
persimilis, 998, 994, 997, 999. 
progne, 996, 995-998, 1002. 
rugata, 999, 994. 
subconcava, 999, 994, 998, 1002. 
vitruvia, 995, 996, 997. 
Lithodomus, 485. 
Lithophaga, 488. 
Litorinide, 1064. 
Lituites, 764, 811. 
lituus, 764*, 811. 
undatus var. occidentalis, 811. 
Lobes, frontal, 697; lateral, 697; palpebral, 697. 
Loligo, 761. 
Longicone, 763. 
Lophospira, 960, 847, 925, 933, 938, 945, 947, 949, 950, 
951, 952, 953, 961, 962, 964, 965, 967, 970, 971, 975, 
977, 984, 987, 989-991, 1005, 1010, 1013, 1014, 1030, 
1046, 1051, 1053, 1054. 
abnormis, 974, 962, 975. 
acuminata, 973, 1030. 
ampla, 981, 951, 962, 974, 976, 979, 981, 983. 
aspera, 963. 
augustina, 987, 963, 988, 1018, 1019. 
var. minnesotensis, 988. 
bicincta, 964, 950, 961. 
bicincta section, 963, 948, 952, 953, 961, 977. 
bicincta subsection, 963. 
bowdeni, 986, 951, 962, 963, 976, 987, 988, 1014. 
bowdeni subsection, 963. 
cassina, 991. 
centralis, 979, 962, 977, 981. 
cicelia, 963. 
cicelia subsection, 963. 
concinnula, 966, 961, 963, 967. 
conoidea, 976, 988. 
conradana, 979, 963, 980. 
decursa, 975, 962, 976. 
elevata, 977, 962, 976, 978. 
estella, 963. 
extenuata, 963. 
fillmorensis, 967, 961, 963, 985. 
gothlandica, 963. 
helicteres, 970, 963, 972. 
var. wisconsinensis, 971. 
helicteres subsection, 963. 
holmi subsection, 963. 
humilis, 968, 961, 963, 989. 
imbricata, 950. 
imbricata subsection, 963. 
knoxvillensis, 989, 952, 953, 962, 964, 990, 991, 
1047. 
labrosa, 952. 
laqueata, 963. 
lirata, 988, 989. 
var. robusta, 989. 
macrospira, 963. 
major, 963. 
medialis, 973, 962, 974, 975, 981, 982, 984. 
var. burginensis, 974, 
modesta, 962. 
THE PALEONTOLOGY OF MINNESOTA. 
multigruma, 978, 962, 977, 979, 981, 1081. 
notabilis, 99O, 950, 951, 962-968, 970, 980, 982, 
984, 985, 1005, 1008. 
obliqua, 965, 963, 966, 980. 
oweni, 980. 962, 974, 976, 979-984, 987. 
peracuta, 976, 962, 978. 
perangulata, 972, 952, 962, 973-977, 979, 981, 
982, 985. 
perangulata section, 962, 980. 
perangulata subsection, 962. 
perforata, 984, 963, 965, 985. 
perlamellosa, 985, 963. 
procera, 968, 961. 
producta, 975, 963, 976. ~ 
pulchella, 982, 962, 966, 973, 974, 983-985. 
pulchra, 982. 
quadrisulcata, 967, 963. 
robusta, 989. 
robusta section, 963. 
saffordi, 982, 962. 
serrulata, 968, 950, 960, 963. 970-972. 
serrulata subsection, 963. 
sororcula, 962, 974. 
spironema, 983, 963, 966, 982. 984. 
sumnerensis, 978, 962, 965, 976. 
tenuistriata, 983, 963, 966, 982, 984. 
trochonemoides, 990, 952, 962, 964, 991, 1047 
trochonemoides section, 964, 962, 990. 
tropidophora, 1081, 962. 
tubulosa, 950, 963. 
tubulosa subsection, 963. 
ventricosa, 980. 
Lower Silurian Cephalopoda of Minn., 760-812; 
Gastropoda of Minn., 813-1081; Lamellibranchi- 
ata of Minn., 475-628; Ostracoda of Minn., 629- 
693; trilobites of Minn., 694-759. 
Loxonema, 1079. 
Loxonematid, 1079, 1069. 
Loxoplocus, 963. 
Lucinide, 487. 
Lunule, 478. 
Lunulicardium, 486. 
Lutraria elliptica, 479*, 
Lyriopecten, 485. 
Lyrodesma, 6O8, 486, 578, 579, 612. 
acuminatum, 609, 610, 612. 
var. intermedium, 610, 611*. 
cannonense, 610, 612. 
cincinnatiense, 610. 
major, 611*, 479*, 612. 
planum, 609. 
poststriatum, 610. 
subplanum, 610. 
Lyrodesmid®, 608, 486, 628. 
Maclurea, 1038, 815, 816, 1031, 1037, 1041. 
bigsbyi, 1039, 1038, 1040. 
var. dixonensis, 1039. 
crassa, 1040, 
var. macra, 1041. 
crenulata, 1038. 
cuneata, 1042, 1041, 
depressa, 1040. 
