Cxx 
THE PALEONTOLOGY OF MINNESOTA. 
Hudson or 
Trenton Period. Cincinnati 
Stones Black 
Raw A Trenton 
Grey: iver, Group. 
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alr |e (n]S@]o alo eazise]5)e 
Helicotoma umbilicata, n. sp...........- 1034 x 
Eccyliomphalus undulatus Hall......... 1036 x 
Eccyliomphalus subrotundus, n. sp..,..- {1037 x 
Maclumeaibies by leetialllllieyejas) crete) vettevetelolelay 1039 x 
Maclurea mitidas WM. SPs. 2-1 ejicee=cisiee 1040 x 
Maclurea depressa, D. Sp.........--e0e- 1040 =< 
Maclurea patula, 0. Sp.........-..eee eee x 
Maclurea patula var. macra, n. var....... x 
Maclurina cuneata Whitfield............ 1041 x 
Maclurina manitobensis Whiteaves...... 1041 x 
Trochonema umbilicatum Hall.......... 1047 x x|x|x 
Trochonema beachi Whitfield............ 1048 xg) 3 
Trochonema beloitense Whitfield...... 1048 x 
Trochonema rugosum, 0. Sp........+...-- x 
Trochonema fragile, n. Sp...............- 1050 6 || 
Trochonema subcrassum, 0. Sp.....-.-... 1051 2 
Trochonema varians, N. Sp.......-.....- x: 
Trochonema retrorsum, D. §p............ 1051 x 
Trochonema albums WS Pi. -lereiieieie l= elm ofa 1052 x 
TMrochonema/sallteri; MeSp.. wien e sac 1053 x(x 
Male aay ae She connmonodgdaodonb.cdaons : x x 
Trochonema robbinsi, 0. Sp........-...-. 1053 x 
MrochonenianloO ba pel all yerteerertsrierera iene 1052 ? Tt 
Trochonema liratum, n. Sp............-- 1056} 
Trochonema pulchellum, n. sp........... 1054 x 
Trochonema semicarinatum Salter....... 1055 x 
Trochonema percarinatum Hall......... x 2 
@yclonemartextiis, M.SpPrec= ec cc.+ a6 ek x 
Cyclonema varicosum Hall............. 1060 x 
VOLO PEA WSIS MIS, Wee SD. csmnletelevere saciid 1065 x 
Holopea concinnula, n. sp...............- 1066 x 
Holopea appressa, 0. Sp......seeeeeeeeee- 1065 xe 
HLOLO PC Ave XCelS ay wiley SP retelcters eioterelsleyalslale ere 1066 x 
Holopea pyrene Billings.................. 1067 x 
Holopea subundata, n. sp..............-- xe 
Holopea rotund ai; Oe Spire cemceinen cle tstereire 1066 x 
VOLO pespamip lay WS pe eteteeieieie te seiereiertele 1065) x 
HolopeaSimilis sn Spiereveiieee st yatclesa ..-. [1066 xe x 
Holopea supraplana, n. sp................ L068 x 
Platyceras (?) wisconsinensis, n. sp...... 1068 x 
Platyceras (?) depressum, n.Sp.........- 1069) x 
Subulites conradi, n. sp................-. 1071 x 
Subulites dixonensis, n.sp.............-: 1071 x|? 
Subulites regularis, n. sp.............-.-- 1072 x 
Subulites beloitensis, n. sp............+-- 1072 iT 
SUbUlibes Spileculay Me S Psa cette sree: 1073 x x| x 
Subulites pergracilis, n. sp...........-..- 1072 x 
Cyrtospira wykoffensis, n. sp.........-..- 1074 x 
Fusispira schucherti, n. sp............... 1076 il 
HUSISPiNAaMODLAISS MeiSps cee ace heel seein 1078 ss 
MUSISpira CONVeXa, M, SP. ...... sce. se ca: 1077 x |? 
HMUSISHITAISUDDTEVIS; WM. SPs. seiseieete es L076 x| x 
Fusispira inflata M. & W............ ... 1075 Sets 
Fusispira inflata var. ventricosa Hall... }1075 x| x 
Fusispira intermedia, n. sp.............- LOT6 x 
Fusispira subfusiformis Hail............. 1077 x 
Fusispira planulata, n. sp................ 1078 xe 
Fusispira vittata Hall................... x|x 
Fusispira vittata var. vaticina, n. var.... x|x 
Fusispira elongata (?) Hall............... x 
Meekospira subconica, n.sp...........-. 1080 
Cincinnati region. 
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