INDEX 



Adams, C. B., cited, iii. 

 Agricultural industry, io6. 

 Akerly, Samuel, cited, no. 

 Ami, H. M., cited, 114. 



Amphigraptns divergens, 84. 

 Arlington, 108. 



Arthursburg, 8, 71, 87-88, 92. 

 Asaphus vetustus, 61. 



Bald hill, 7, 14, 78, 99. 



Bald hill granite gneiss, 11, 14-16, 



19, 20-21, 32, 34, 40. 

 Barnegate limestone, see Wappinger 



limestone. 

 Barrande, J., cited, in. 

 Bascom, F., cited, 116. 

 Bastite, 39. 

 Bathyurus, 60. 



crotalifrons, 61. 



taurifrons, 61. 

 Bayley, W. S., cited, 116. 

 Beekmantown formation, 56, 59-61, 



62, 64, 71, 72-75. 

 Bellerophon bilobatus, 83. 

 Berkey, Charles P., map prepared 



under direction of, 5 ; acknowledg- 

 ments to, 5; cited, :^6, 115, 116. 

 Bibliography, 1 10-16. 

 Biotite, 16, 17, 18, 22, 23, 27, 30, 31, 



32. 

 Bishop, I. P., cited, 113. 

 Bonney hill, 80. 

 Booth, Henry, mentioned, 83, 84; 



cited, 112. 

 Breakneck mountain ridge, 7. 

 Brick industries, 107. 

 Briggs, mentioned, 61. 

 Brinckerhoff, 9, 76. 

 Buried river channels, 97. 

 Bythotrephis antiquata, 60. 



subnodosa, 83. 



Calcareous shale, 47. 

 Calciferous-Rochdale group, 59. 



Calymmene senaria, 67. 



Camelot, 52, 104. 



Carthage Landing, 102. 



Casper creek, 8, 9, 98, 104, 105, 108. 



Ceraurus pleurexanthenius, 67. 



Chaetetes compacta, 62. 



lycoperdon, 6y. 

 var. ramosa, 60. 



tenuissima, 61, 62. 

 Chestnut ridge, 8. 

 Chlorite, 18, 30, 31. 

 Clarke, John M., acknowledgments 



to, 5; quoted, 50; cited, 59, 62, 65, 



83, 115- 

 Clarke, W. R., mentioned, 39. 

 Clays, 107-8. 



Climactograptus bicornis, 84. 

 Clinton Point Stone Company, 52, 



53- 

 Clove creek, 9. 



Conglomerates, summary of feat- 

 ures shown by, 91-92. 

 Conocephalites, see Ptychoparia. 

 Cook, George H., cited, in. 

 Cushing, H. P., mentioned, 56. 

 Cyrtoceras, 60. 



dactyloides, 61. 



microscopicum, 61. 



vassarina, 61. 



Dairy farming, 106. 



Dale, T. Nelson, mentioned, 10; 



cited, 83, 112, 115. 

 Dalmanella testudinaria, 67, 83, 84. 

 Dana, J. D., mentioned, 10; cited, 



26, 46, 65, 75, log, III, 112, 113, 



114. 

 Danskammer, 55, 97, 98, loi, 102, 107. 

 Darton, N. H., cited, 113. 

 Dewey, Chester, cited, no. 

 Dicellocephalus, 49. 

 Dicellograptus divaricatus, 84. 

 Dichograptus, see Dicellograptus; 



Dicranograptus. 



117 



