INDEX 



Acrotreta emmonsi, ^2 



sagittalis taconica, 'j2 

 Adams, F. D., cited, 24 

 Adirondack highland, 8-10 

 Agraulos, z^, 38 



saratogensis, 42 

 ( Albany, molding sand. 148 



Albany county, Canajoharie shale, 



100 

 Vlbany, Lake. 146. 147 

 Amphibolite, 18, 19, 20, 21 

 Amsterdam limestone, 31, 45-47, 60, 



61. 62. 63, 138, 13a 149, 151, 165 

 Analyses, diabases, 30; Laurentian 



granite, 24 

 Andesine, 18, 28 

 Anorthosite, 16, 26 

 Apatite. 21. 23, 28 

 Archinacella orbiculata, 97, 99 

 Arthroclema pulchellum, 47 

 Asaphus platycephalus, 76 

 Ashburner, C. A., mentioned, 90 

 Atops trilineatus, d^, 108 

 Augite, 29 



Bald Mountain, 7, 14, 66, 72, Ti, 



77, 108, 114 

 Bald Mountain limestone, 66. 75- 



80. 106. 108, no, 113, 141, 149, 151. 



165; first use of term. 78 

 Ballston Springs, loi. 105 

 Bassler, R. S., cited, 83 

 Bathyurus spiniger, 47 

 Batten kill, 13, 14, 103, in, n2 

 Beekmantown group, 138 

 Beekmantown limestone. 42, 66, 



108. 165 

 Biotite. 18. 21, 23, 28 

 Black lake. 10 

 Black mica, 18, 21 

 Black patch grit, 67, 69 

 Black River history. 138-42 

 Black River limestone. 31 



Bomoseen grit, 66. 69, 71 

 Botsfordia caelata. 72 

 Brainerd, E., cited, 42 

 Broadalbin quadrangle. 5 

 Bythocypris cylindrica, 80 



Calymmene senaria. 76. 97 

 Cambric black shale. 67. 69 

 Cambric history, 32-45. 136-37 

 Cambric roofing slates. 67, 69 

 Cameroceras brainerdi, 77 

 Canajoharie shale. 31, 47, 48-51, 59, 



60, 61. 100. loi, 102, 105. 139, 165 

 Carabocrinus cf. radiatus. 96 

 Carbonated waters. 153-54 

 Cenozoic history, 145-46 

 Ceratiocaris. 67 



Ceraurus cf. pleurexanthemus. 80 

 Chadwick. G. H., cited. 115 

 Chazy basin, 31 ; deposits, 136-37 

 Chazy limestone. 66. 138, 165 

 Chrysoberyl, 23 

 Clark, P. Edwin, cited. n2 

 Clark Mills, 103 

 Clarke, F. W., cited. 164 

 Clarke, J. M., cited. 2>^, 42 

 Clathrospira subconica, 97 

 Clidophorus. 99 



foerstei. 96 



ventricosus. 96 

 Climacograptus bicornis. 86. 92, 93 



modestus. 86, 92 



parvus. 91. 92. 93 



putillus 7'flr. eximius, 93 



schareiil)ergi. 91 



spiniferus. 50. 07. 99 

 Clinton county. 29. 34 

 Clitambonites americanus. 96 

 Columbia county, table showing the 



Lower Cambric scries. 68 

 Columnaria halli. 47 

 Conocoryphe s*^.. 67 



171 



