148 



NEW YORK STATE MUSEUM 



Glossograptus quadrimucronatus, 7, 

 12, 2^, 28, 32 

 mut. cornutus, 24, 2^, 28, 30, 31, z^, 



34 



mut. pertenuis, 61 

 Glowegee, 32, 34 

 Glyptocrinus sp., 59, 61, 85 



decadactylus, 86 

 Grabau, A. W., cited, 72, 73, 12, 13, 



46, 54, 56, 57, 58 

 Graptolites, 12, 21, 43 



dentatus, 7 



scalaris, 7 

 Graptolithus mucronatus, 9 



pristis, 9 



putillus, 80 

 Gratacap, L. P., acknowledgments 



to, 6; mentioned, 74 

 Gregory, J. W., cited, 71, 89 

 Guilderland, 47 



Hall, James, cited, 70, 8, 23, 46, ^z, 



80, 86, 95, 97, 99, 104, 108, 109, 117, 



118 

 Harper, G. W., cited, 71 

 Harris, cited, 57 



Hartnagel, C. A., cited, 55, 56, 57 

 Helderbergs, 47 

 Helopora sp,, 51 

 Hemipronites americanus, 94 

 Herbertella sinuata, 93 

 Heterocrinus, 51 



gracilis, 59, 61, 86 

 Hoffman Ferry fault, 15 

 Holm, cited, 115 

 Hormotoma cf. gracilis, 30 

 Hovey, E. C., acknowledgments to, 



6; cited, 71, 118; mentioned, 108 

 Hudson Falls, 2)2)y 34 

 Hudson River group, 8, 9, 10, 11, 15 

 Hudson River shales, 29, 30, 47, 53; 



thickness, 38 

 Hughmilleria magna, 42, 45, 46, 48, 



49 

 Hyatt, Alpheus, cited, 71, 114 

 Hyolithes, 51 



baconi, 11 1 



pinniformis, 23, 64, 111-12 



Ilion, 15 

 Ilion gulf, 34 



I 



Indian Ladder beds, 38, 39, 48, 50- 

 54, 57, 69; name proposed, 52; 

 summary of conclusions, 67 



ischyrina, 123 



Isotelus, 25, ZZ 

 gigas, 42, 49, 62, 1 16-17 



Jacksonburg, 27, 28 

 Jacksonburg limestone, 22 

 Jaekel, Otto, cited, ^2, 88 



Kayaderosseras creek, 32 

 Kiimmel, H. B., cited, 72 



Lapworth, cited, 80 

 Lasiograptus (Thysanograptus) eu- 

 charis, 16, 17, 18, 19, 20, 23, 24, 

 2^, 2T, 28, 30, 31, 32, zz, 34, 42, 

 49, 61, 63, 84 



figures, 85 



harknessi, 85 

 Leperditia bivertex, 120 

 Lepidocoleus jamesi, 2Z, 48, 51, 60, 



61, (i2 

 Leptobolus insignis, 16, 17, 18, 21, 



22, 2Z, 24, 25, 26, 28, 30, 31, 32, 35, 



36, 41, 42, 44, 48, 49, 61 

 Leptograptus annectans, 9, 27, 28, 31 



insignis, 17 

 Levis basin, 69 

 Lingula, 35 



curta, 9, 21, 22, 2Z, 24, 25, 26, 27, 

 28, 61 



obtusa, dz 



quadrata, 20, 91 



rectilateralis, 41, 42, 49, 50, 91 

 Liospira cf. rotuloides, 23 

 Little Falls dolomite, 15 

 Lophospira uniangulata var. abbre- 



viata, see Murchisonia (Lopho- 

 spira) uniangulata -uar. abbreviata 

 Lorraine beds, 8, 11, 13, Z7, 58 

 Lyrodesma acuminatum, 104 



cannonense, 104 



poststriatum, 104 



pulchellum, 104, 105 



schucherti, 60, (i2, 103 



Magog shales, 12, 14, 58 

 Manlius limestone, 53 



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