INDEX 



The superior figures tell the exact place on the page in ninths; e. g. igo 3 

 means page 190, beginning in the third ninth of the page, i. e. about one 

 third of the way down. 



Abbot, Francis, hermit of Niagara, 



12 1 . 

 Acroculia angulata, 21 1 5 . 



niagarensis, 211 3 . 

 Aechmina, 220'. 



spinosa, 220 3 . 

 Age of Niagara, 82 5 -85°. 

 Alasmidonta, 250 1 -5i 1 . 



calceola, 2S0 = . 



truncata, 250-51 1 . 

 Algonquin lake, 59", 62 1 ; map, 63. 



river, 62". 

 American falls, rate of recession, 83 1 ; 



illus. facing p. 38. 

 Amnicola, 241 1 . 



letsoni, 241 1 . 



limosa, 241". 

 Anastrophia, i89 ? -90 c . 



brevirostris, 190 3 . 



interplicata, 100 s , 190 1 . 

 Annelida, 161 1 . 

 Anoplotheca, 205 5 -6 3 . 



hemispherica, 96 1 , 205 7 . 



plicatula, 96 1 , 96°, 205' J -6 3 . 

 Anthozoa, i35 = -48 7 . 

 Argyle, duke of, quoted, 12". 

 Arthrophycus, 132". 



harlani, 93°, 122 3 , 132 3 ; illus. fac- 

 ing p. 132. 

 Ashburner, C. A., cited, 253". 

 Astrocerium constrictum, 142". 



parasiticum, 141 5 . 



pyriforme, i4i s -42 5 . 



venustum, I40 s -4i 4 . 

 Atrypa, i95'-9"7 3 . 



aprinis, 200 7 . 



bidens, 194 s . 



bidentata, 195 1 . 



brevirostris, 190 3 . 



camura, 201 5 . 



Atrypa, congesta, 20^-^. 

 corallifera, 179 s . 

 cuneata, 192 3 . 

 cylindrica, 203 7 -4 2 . 

 hemispherica, 205 7 . 

 intermedia, 203 4 . 

 interplicata, 190 1 . 

 neglecta, 193 5 . 

 nitida, 202". 



var. oblata, 202°. 

 nodostriata, ioo 3 , 102 1 , 102 2 , 103 6 , 



196°. 

 oblata, 203 1 . 

 obtusiplicata, 193". 

 plicatula, 205 9 -6 3 . 

 quadricostata, 204°-5''. 

 reticularis, 97°, ioO 1 , 102' 2 , 103'', 



i95 7 -96 5 . 

 robusta, 194 3 . 

 rugosa, ioo 7 , i96 ; '-97 3 . 

 Avicula emacerata, 207 7 . 

 orbiculata, 2o8 s -9 1 . 

 subplana, 2o8 ! . 



Bakewell, R., cited, 253". 

 Ballou, H. W., cited, 253 s . 

 Barrandella, 191 3 . 



fornicata, 191 7 . 

 Batostomella, i64°-6s 1 . 



granulifera, i64 s -6s 1 . 

 Bed and stratum, distinction between, 



108 9 . 

 Beyrichia symmetrica, 219". 

 Bibliography of geology of Niagara 



and Great lakes, 2.53-62. 

 Biddle stairway, n 3 . 

 Bigelow, cited, 49°. 

 Bigsby, mentioned, 6'. 

 Birdseye view of Niagara region, 



25 2 - 



