INDEX 
A. Page. 
Acidaspis 42,43,44,48 
Actinopteria 42 
Agnostus tuberculatus 85 
Alder Brook, localities examined near. 202,203 
"Alley's grindstone," locality exam- 
ined at 202 
Sheridan sandstone at 132-133 
Ami, H. M., fossils identified by 37,38,41 
Amphigenia 91 
Anadontopsis 40 
Analyses, andesites 171-172, 188 
bostonites 166 
calcif erous sandstone ' 139, 188 
diabase 176,179,188 
quartz- trachytes 166, 167, 188 
rhyolites 155,188 
teschenites 183,188 
volcanic tuff. 124,188 
Anastrophia 43 
Anatina 34 
Andesite, cleaved, plate showing. 101 
Andesite ash beds, occurrence of 175 
Andesites, analyses of 171-172, 188 
occurrence and character of. 111-114, 168-175 
Andesitic breccia, plate showing 112 
Andesitic lava, plate showing 112 
Anoplia 42 
Anoplotheca 47,48,53 
Anoplotheca hemispherica 49 
Anticosti group, age of 23, 24 
Aplite, occurrence and character of... 149 
Aporoxylon 31 
Area 86 
Arenaceous limestones, occurrence and 
character of 140-141 
Arisaig, Nova Scotia, fossils from 40-41 
Arisaig rocks, fauna of 86-87 
Aroostook County, geology of volcanic 
areain 93-188 
localities examined in 193-202 
new Paleozoic f ossil s from ... 44-92 
Paleozoic ter ranes of 21 27 
plate showing volcanic area in 105 
Aroostook Palls, diabase at 115, 175-177 
Aroostook Junction, localities examined 
at 203 
Aroostook limestone, age of 21,44-45 
new fossils from 44-45 
occurrence and character of 1 1 1 II'. 
plates showing 140,142 
Aroostook River, aplite on 149 
calciferous quartzitic sandstones 
on 138 L39 
Page. 
Aroostook River, granite on 105-106 
limestones on 141-143 
localities examined on and near 195, 
197,198,201,202,203 
manganif erous iron slates on 145 
metamorphism on 151 
Paleozoic fossils from 44 
sandstones at 137-138 
Ashland, fossils from , 29,53 
localities examined near 202 
Ashland Junction, localities examined 
at... 195,196 
Ashland limestone, age of 21,51,52 
features and fossils of jl 52-54 
occurrence and character of 143 
Ashland shales, age of 21 
features and fossils of 49-51 
Ashland Township, volcanic conglom- 
erate in 127,129 
volcanic tuff in 121,125 
Ashland village, features of rocks at. . . 49 
fossils from 50,52,53 
fossilif erous limestone at and near. 143 
localities examined near. 202 
Ashland-Sheridan road, volcanic tuff 
on ...:. 121-122,125-126 
Athyris. 29,31,55 
Athyris bella 32 
Athyris blancha 32 
Atrypa 29, 
31, 32, 33, 34, 35, 36, 37, 39, 47, 49, 50, 52, 54, 55 
Atrypa reticularis 38,52 
Atrypina 53,55 
Augite-andesite, occurrence and char- 
acter of 169-172 
Autodetus 42 
Avicula 28, 
29,30,83,34,36,38,41,53,79,80,86,89,89,90,91 
Aviculopecten 42 
B. 
Balls Mills, localities examined at 197 
Bailey, L. W., cited on age of Mapleton 
sandstones 137 
cited on Aroostook limestones 141 
cited on occurrence of syenite 149 
titles of papers on Maine geology 
by 104 (note) 
Bailey and Mclnnes, Canadian rocks 
containing Oriskany fauna re- , 
ported by 37 
fossils identified by.. 33 
Baileys Landing, Missouri, fossils from. 43 
205 
