INDEX. 
143 
Pase 
F« ;ssiliferous zones, features of 20-23 
subdivisions of 21 
transgression of 23 
Fossils, association of certain species of, 
with certain kinds of sediments 113 
bionic value of 124-134 
Fossil faunas, use of, in geologic correlation, 
title of paper on 27 
Geiger, H. R., work done, by 8 
Genesee section, faunal zones of 46 
Genesee shale, fossils of 99 
geographic extent of 115 
stratigraphic place of 47. 99, 115, 122 
thickness of 93 
Genesee slate fauna, geologic place of 45 
Genesee Valley, Spirifer disjunctus fauna 
of 85 
Genera, life endurance of 30-31 
Generation or generative power, utilization 
of, as a measure of bionic value of 
fossils 124-134 
Geobios, definition of term 14 
Geochron, definition of term 31, 132 
Geologic correlation, importance of 10 
methods of 117-120 
work done in 10 
Geologic faunas, nomenclature of . 20-27 
Geological time-scale, definition of 118-119 
Glytocardia speciosa, occurrence of 99 
stratigraphic horizon of 99 
Glyptocardia speciosa fauna, geologic place 
of 49 
epoch of, limits of 133 
Glyptodesma erectum, occurrence of 91 
Goniophora hamiltonensis, occurrence of . . 90 
Goniophora subrecta, occurrence of 96 
Goniatite beds, geologic place of 50 
Grabau, A. W., aid by 49, 57 
cited on fossils from EighteenmileCreek, 
New York 92 
cited on Hamilton fauna of Eighteen- 
mile Creek 80 
cited on Hamilton fauna of Michigan. . 65 
Grammysia, occurrence of 90 
Grammysia bisulcata, occurrence of 95 
Grammysia circularis, occurrence of 95 
Grammysia communis, occurrence of.. . 85, 86, 96 
Grammysia elliptica, occurrence of 77, 78, 95 
Grammysia globosa, occurrence of 77 
Grammysia nodocostata, occurrence of 77, 95 
Grammysia subarcuata, occurrence of 74, 95 
H. 
Haeckel. Ernst, names for biologic aggre- 
gates proposed by 14 
Hall, James, cited on Glyptocardia (Cardi- 
ola) speciosa 49 
Hall, James,- and Clarke, J. M., cited on 
common features possessed by many 
orthids 85 
Halobios, definition of term 14 
Hamilton fauna, stages or faunules of 47 
geologic place of 122, 123 
Page. 
Hamilton formation, beds composing 50 
character of 114 
extent and limits of 68, 114 
fauna of, identity of, with that of part 
of Chemung formation 38 
faunas of 47, 48, 50-56, 103, 114-115 
lithologic characters of 114 
stratigraphic place and equivalents of . 4">, 
47, 50, 122, 123 
thickness of 93 
Harris, G. D., aid by 9,49 
cited on fauna of the Chemung forma- 
tion 85-86 
Harris, G. D.. and Dall, W. H., work in 
geologic correlation done by 10 
Heliophyllum halli zone, geologic place of. 45 
Hemera, definition of 31, 102, 132 
faunal equivalent of 31, 130 
Heterotopic, term proposed 54 (note) 
High Point, Naples, N. Y., fauna at 78-79 
Holonema rugosa, occurrence of 96 
Homeotopic, term proposed 50 (note) 
Huron shales, equivalents of 122 
Huxley, T. H., cited 33 
Hypothyris cuboides, occurrence of 78 
Illinois, Hamilton formation in, fauna of.. 66 
Indiana, Tropidoleptus carinatus fauna in. 66-67 
International Congress of Geologists, ex- 
tract from Compte Rendu of 11-12 
Iowa, Devonian faunas of, relations of 79 
Ithaca, N. Y., investigations begun at 6, 7 
Ithaca formation at, fauna of 73-76 
Ithaca fauna, geologic place of 45 
mingling of, with Chemung fauna 100 
Ithaca formation or group, correlation of. . 47, 
99, 103, 104, 109, 112, 115 
fauna of 45, 50, 73-76, 78-81, 88, 95, 98, 115 
geologic horizon of 47, 
99, 103, 104, 109, 112, 115, 120, 122, 123 
immigrant species of 78-81 
limits of . 43 
sediments forming, features of 110 
stratigraphic equivalents of 47, 
99, 103, 104, 109, 112, 115, 120, 122, 123 
thickness of , 93 
Juliand Hill, Chenango County, New York, 
fossils found at 94 
K. 
Kindle, E. M., aid by 9,49 
cited on fauna of Ithaca formation 73, 80 
cited on Tropidoleptus carinatus fauna 
of Indiana 66 
work done by 8 
Lamellibranch fauna, geologic place of 46 
Leda brevirostns, occurrence of 77 
Leda diversa, occurrence of 72, 95 
Leiopteria bigsbyi, occurrence of 90, 95 
