INDEX. 
Monotrypa globosa 0. SDp.......e00.38, 142, VIII. 
spheerica (Hal)).....82, 274, XX VI. 
IMIOMMOSISH BLCNesscasccesnstsesececeecacecescarcssiscenes 106 
faunas of, descriptions of.. 379 
Mud pond, fossils M€AL.......s0.secccorersscecsee, 46 
Miytilarca: Sp. UNGECt.........cccccssescoeeccens conse 65, 89 
obliqua N. sp............68, 245, XXII. 
Mytilarea ? sp. undet................ 318, XXXIX. 
N. 
Nearpass quarry, fossils at....... 63, 76, 78, 82, 92 
SECUIO ING eocerscoccconmnctocoucencocmone: | LY 
fossils in.......... 86, 87, 94, 97, 99 
Newfoundland, fossils at and near........ 71, 105, 
106, 107 
Newfoundland grit ............. sectieaecursscisssece 104 
Newfoundland grit fauna, description of.. 372 
New Scotland beds.......... Uececcestenacceesccsens 59, 86 
New Scotiand-Becraft fauna, descriptions 
WO laesecscncrcacecacecssccurestionsebsestioseccersrloscasecceres 297 
Newton, fossils near................12, 13, 41, 42, 45 
Nucleospira ventricosa Hall...........83, 87, 290, 
316, XXX., XX XVII. 
Nucula ? sp. undet..........:-s000. 68, 242, XXII. 
Nucula levata Hall.......... Daeacecsetsoenesseezeeee LOO 
Nyctopora billingsi Nich.. ............00««.28, 39, 42, 
46,137, VII. 
oO. 
Odontopleura parvula Wale. ?..........201, XV. 
Olenelius ? sp. undet.............00008 eon Ae a Us 00 
Olenellus thompsoni (Hall) ...............114, II. 
OlenUs thOMPSONE .....c000. seeeeee Net aeeceeran fener pata E 
Onondaga liIMEStONE.........cscecseccsreercoseeree 103 
Onondaga limestone fauna, descriptions 
Ole eisvadeces Veceseeees Meseacerecceses Teen eenscecareans 365 
Ophileta ? sp. UNEL..............ccsssessooscsselD, 12D 
Orbiculoidea ? Sp. UNGET.......00. sceccorssseceee 39 
Orbiculoidea sp. uNnet........010-0. ccseeee: 147, IX. 
ampla (Hall)..........94, 324, XLI. 
jervensis (Barrett).............. 97, 98, 
343, XLY. 
jervensis zone, The............ 97 
lamellosa (Hall).................26, 30, 
39, 147, IX 
Ordovician faunas...........ccccccsscesccnece Aocecp | 183 
Ordovician fOrmatiONS. .........-scccesescecesrsee LO-OD 
Oriskany faunas, descriptions Of.............. 341 
Oriskany formation..........ccsecerseecoeressecveere, 60, 93 
Orthis bicostatus Van. ... 
electra Billings... 
eminens Hall........... Rdaccesneccuscasestncsers 304 
flabellites Foerste.........65, 72, 231, XX. 
hipparionyT Hall......secersecccsrrseccceee G46 
insignis Hall........... 
interstriata Hall..... Surissstesscestoneaaces 229 
ONULETStTZOLCEVANe eencaacetscecesssuceccecsess) ONT! 
musculosa Hall....... 
newtonensis n. sp... Pe Pali leyi af 
oolatapHal |liteeeceececcacce: Baecachustresseers 304 
(Dinorthis) pectinella Hall & Clarke., 154 
459 
Orthis perelegans Hall...... seveneveteesaussccaaiersts 305 
plicatella; FLAlliclescscssececes Rnceueceesees 152 
Strophomenoides HAll........2000000sc00e0025 BOS 
SUDHYUALA CONTAG..ccecssrsecocerereseenseee 156 
subcarinata Hall 306, 326 
(Dalmanelia) testudinaria W. & S....... 155 
ETICEM ALIA COM Neescrsseececceee Siivseecnce 22, 38, 
40, 42,48, 151, IX. 
VONUTEMY FLAN Ge ss :sccsssecsecsescssercrceee OOS 
VORLCOPELAN tpeeaareeeaceceere ecteressascecsesea OO 
Orthoceras sp. undet...........19, 26, 27, 28, 30, 31, 
32, 34, 35, 36, 40, 43, 63, 
79, 89, 95, 95, 98, 190, 
265, 319, 337, 364, 
SNOT PRONG VP exer Lil his 
tenuitextum (Hall).........189, XIII. 
tenwi striatum (ED) Racr-cccsccsececserss 24, 
25, 188, XIIT. 
Orthodesma sp. uNGEt.... 220.0 ccscccces-ceeeeee- 3 
canaliculatum Ulrich.......... 30, 
171, XI. 
Orthostrophia strophomenoides (Hall)......... 89, 
9), 303, XXXIV. 
Orthothetes sp. undet................ 97,347, XLV. 
chemungensis (CONn.).......s-.. 106 
deckerensis n, sp........ 63, 64, 65, 68, 
69, 70, 71, 229, XX. 
interstriatus (Hall) .............. 65, 66, 
70, 229, XX. 
pandora (Bill). ........ 104, 105, 367, 
373, 880, LII., LIII. 
woolworthanus (Hal))..........85, 88, 
278, 303, XXVII., XXXIV. 
Oxford Furnace, fossils near................s00 11 
Oxy GISCUS WAP UN GCUietesscacceecssecescesceesneeee 40 
subacutus Ulrich............ Ir 5 00 
14 
Paleoneilo emarginata (Con.) .............. 107 
Paleozoic formations, general relations... 7 
TAD COLA ccsccsrescces 9 
Paracyclus elliptica Hall ? .............0.220.00 107 
Parastrophia hemiplicata (Hall)........ 23, 26, 38, 
40, 41, 42, 43, 44, 158, X, 
Pentamerus circularis n. sp......... 65, 233, XX. 
DAlEAGUS HAM eee cceeveresssescres 279 
Peter’s Valley, fossils N€AT............0.sscc.69, 83, 
89, 95, 101, 103 
Stormyville sandstone near.. 91 
‘SPeth stomeee-s... copceccooucocteno. “ZU 
PHACOPS|SP.- UNGEE ecccnese, covcoccnssevescees 85, 98, 100 
callicephalus Hall,...... ELE RE ESSdOScer 206 
logani Hall........... 87, 89, 92,321, XL. 
TA aN (GLECN) ievecessectesceuctsvcasesecasm LOO 
Phacops ? sp. undet........-...+066 sesscoenee DO4, L, 
PhHOMGOPS Sp -UN Getic ncsssasssassenseseenesncscses nO) 
arenaria Hall ?..100, 101, 344, XLV. 
ovata Hall............ 63, 66, 86, 101, 102, 
226, 300, 345, XX. 
OVALUSHE aE ceecsssscsecsstereesense ee O 
PhragmolitesispsunGetiscccssessescoccsycavceerses 29 
ee acccecces sevccccce 
