?8o 



NEW YORK STATE MUSEUM 



Isochilina, 218 3 . 



cylindrica, 218°. 



Lacustrine period, 57 <J -6S°. 



Lake basins, origin, 50 3 . 



Lake region, tilting of the land, 65 s . 



Lakes, maps of Great lakes, 61, 62. 

 Sec also names of lakes, as 

 Irocmois, Ontario. 



Lamellibranchiata, 2o6 4 -io~. 



Lampsilis, 248 G -49°. 

 ellipsiformis, 249 s . 

 rectus, 248°-4Q 2 . 



Larviformia, I53°-5S*. 



Laurentian glacier, thickness, 55 s -56°. 



Laurentian old-land, composition, 

 3i 3 - 



Laurentian region, diagrams show- 

 ing type of drainage existing in, 



44, 45- 

 Laurentian river, 49". 

 Laurentide mountains, 26*, 36". 

 Lawson, cited, 36'. 

 Lecanocrinus, 160 1 . 



macropetalus, 160'". 

 Leperditia, 2i8 s -i9*. 



scalaris, 219 1 . 

 Leptaena, 180 1 . 



depressa, 180'. 



patenta, 182". 



rhomboidalis, 101 4 , 180 4 . 



sericea, 183'". 



striata, 182 3 . 



subplana, 184". 



transversalis, 183''. 

 Lesley, J. P., cited, 257 1 ; mentioned, 



18 1 . 

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



Niagara river gravels, 238-52. 

 Leverett, Frank, cited, 256 s , 57°; 



mentioned, 6'. 

 Lichas, 224 s -2S i . 



boltoni, 225 2 ; illus facing p. 225. 

 Lichenalia, 176 1 . 



concentrica. 101 7 , 176 3 . 

 Life history of Niagara Falls, 55 1 - 



85°. 

 Limestone beds, 28°, 29 s . 

 Limestone cliff, 29 ? . 

 Limestone lenses of the Clinton, 

 99°-i02 T . 



Limestones, formation, i2-| : '-_!i>. 

 Limnaea, 243 '-4 i\ 



catascopium, 244°. 



columella, 244". 



decisa, 243 7 . 



desidiosa, 244*. 



heterostropha, 245 1 . 

 Lingula, 88°, 116 , 178 3 . 



cuneata, 89', 92' 1 , 178 7 . 

 Lioclema, i65"-66". 



aspera, i65 7 -66". 



florida, 165". 

 Liopteria, 208 1 . 



subplana, 2o8 l . 

 Lockport limestone, 33°, 34 , 105''- 



13"; illus. facing p. 94. 

 Logan, cited, 36*, 36 ; mentioned, 6 7 . 

 Lorraine shales, 33 1 . 

 Lowlands, formation, 55'". 

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



54- 

 Luna island, u 3 . 

 Lundy's Lane, battle of, 13". 

 Lyell, Charles, cited, 257 1 , 82 7 ; men- 

 tioned, 6 7 , 18 7 . 

 Lyriocrinus, IS6 U -57' J . 

 dactylus, if;6 -S7 3 . 

 Lyriopecten, 2o8 G -9 1 . 



orbiculoides, 2o8 s -9 1 . 



Maid of the mist, io 1 , 12 s , 14 5 . 

 Manlius limestone, 29 s , 33', u6 7 -i7 s , 



128 ; and Onondaga limestone, 



unconformable contact, i«i8*. 

 Map, geologic, 22 1 . 

 Marcellus shale, 30". 

 Marcou, Jules, cited, 257". 

 Margaritana marginata var. truncata, 



250^5 1 1 . 

 Marine organisms, in Great lakes, 



64°. 

 Mattawa river, 62 7 . 

 Maw, George, cited, 2.S7~_. 

 Medina sandstones and shales, 26 s , 



32?, 34\ 60 s , 87 3 -95 7 ; illus. facing p. 



86, 92, 94; fossils, 123 4 , 232-37. 

 Melina livescens, 239°-40 3 . 



niagarensis, 240*. 

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

 Michigan, lake, rising of waters, 65 s . 



