?8o 



NEW YORK STATE MUSEUM 



Isochilina. 2i8\ 



cylindrica, 2i8^ 



Lacustrine period, 57'' -65^ 



Lake basins, origin, 5ol 



Lake region, tilting of the kind, 65^ 



Lakes, maps of Great lakes, 61, 62. 



See also names of lakes^ as 



Iroquois, Ontario. 

 Lamellibranchiata, 2o6*-io", 

 Lampsilis, 248"-49^ 

 ellipsiformis, 249^ 

 rectus, 248'''-4Q". 

 Larviformia, i53"-55'. 

 Laurentian glacier, thickness, 55'''-56". 

 Laurentian old-land, composition, 



31'- 

 Laurentian region, diagrams show- 

 ing type of drainage existing in, 



44, 45- 

 Laurentian river, 49". 

 Laurentide mountains, 26^ 36'. 

 Lawson, cited, 2)^\ 

 Lecanocrinus, i6o\ 



macropetalus, 160". 

 Leperditia, 2i8'^-i9\ 



scalaris, 219^. 

 Leptaena, 180^. 



depressa, i8o\ 



patenta, 1812*. 



rhomboidalis, loi*, 180*. 



sericea, 183". 



striata, I82^ 



subplana, 184'. 



transversalis, 183*. 

 Lesley, J. P., cited, 257^; mentioned, 



i8\ 

 Letson, E. J., Post-pliocene fossils of 



Niagara river gravels, 238-52. 

 Leverett, Frank, cited, 256^, 57"; 



mentioned, 6". 

 Lichas, 224^-25'. 



boltoni, 225'; illus facing p. 225. 

 Lichenalia, I76\ 



concentrica, loi^ 176^ 

 Life history of Niagara Falls, 55^- 



85". 

 Limestone beds, 28", 291 

 Limestone cliff, 29^ 

 Limestone lenses of the Clinton, 



99"- 1 02'. 



, Limestones, formation, 124^-26". 

 Limnaea, 243^-4 4'. 



catascopium, 244^ 



columella, 244'. 



decisa, 243^ 



desidiosa, 244*. 



heterostropha, 245\ 

 Lingula, 88^ 116^ 17^'. 



cuneata, 89^ 92^ 178". 

 Lioclema, i65"-66". 



aspera, i65'-66". 



florida, 165*. 

 Liopteria, 2o8\ 



subplana, 208'. 

 Lockport limestone, 2)^"^, 2>4\ lOS"- 



13''; illus. facing p. 94. 

 Logan, cited, 36*, 2)^'^; mentioned, 6\ 

 Lorraine shales, 2>Z^. 

 Lowlands, formation, 55-. 

 Luna falls, illus. facing p. 10, 38, 



54- 

 Luna island, II^ 

 Lundy's Lane, battle of, I3^ 

 Lyell, Charles, cited, 257^ 82'; men- 

 tioned, 6', 18". 

 Lyriocrinus, 1S^^-S7^- 

 dactylus, 156^-57^ 

 Lyriopecten, 2o8"-9\ 



orbiculoides, 208^ -9\ 



Miaid of the mist, io\ 12^, I4^ 



Manlius limestone, 29^ 2)3' , II6'-I7^ 

 I128''; and Onondaga limestone, 

 unconformable contact, li8\ 



Map, geologic, 22\ 



Marcellus shale, 30''. 



Marcou, Jules, cited, 257". 



Margaritana marginata var. truncata, 

 25o"'-5i'. 



Marine organisms, in Great lakes, 



Mattawa river, 62", 



Maw, George, cited, 257".. 



Medina sandstones and shales, 26'', 



2>3\ 34', 60', 87'-95'; illus. facing p. 



86, 92, 94; fossils, 123'', 232-37. 

 Melina livescens, 239^-401 



niagarensis, 240*. 

 Merrill, F. J. H., cited, 257'. 

 Michigan, lake, rising of waters, 65^ 



