172 



NEW YORK STATE MUSEUM 



Corinth, 12, 34, 59 

 Corynoides sp., 96 



calicularis, 50, 51, 98 



gracilis, 91, 92, 98, 99 

 Cremacrinus sp., 96 

 Cryptograptus tricornis, 92 

 Cryptozoon, 39, 44 



sp., 77 

 proliferum, 42, 45 



Crystalline rocks, 7, 8 



Ctenobolbina subrotunda, 97 



Ctenodonta, 99 

 declivis, 96 

 levata, 96 

 prosseri, 96 

 radiata, 96 

 recta, 96 

 subcuneata, 96 



Cumings, E. R., cited, 54, 56 



Cuneamya acuitrons, 97 



Cushing, H. P., Location and char- 

 acter, 6-7; General topography, 

 8-15; General geology, 15-16; Pal- 

 eozoic rocks of the western 

 trough, 30-32; Structural geology 

 of the western basin, 53-65; The 

 Northumberland volcanic plug, 

 115-35; Economic geology, 148-52; 

 cited, 21, 31, 38, 42, 107, 134; 

 mentioned, 72, 



Ruedemann, Rudolf, Histori- 

 cal geology, 135-48 



Cyclonema cushingi, 97 

 montrealense, 97 



Cyclora cf. minuta, 97 



Cyrtoceras confertissimum, 77 



Dale, T. Nelson, cited, 11, 66, 67, 

 70-71, 76, 79, 85, 86, 87, 89, 90, 103, 

 109, no, 112, 113 



Dalmanella rogata, 47 

 testudinaria, 76, 96, 98, 99 



Darton, N. H., cited, 53, 59, 60 



Davis, W. M., cited, 118 



Deep kill, in 



Deep Kill graptolite fauna, 112 



Deep Kill shale, 66, 75, 141, 142, 165 



Descriptive geology, by H. P. Cush- 

 ing, 16-30 



Diabase, 17, 21, 28-30; analyses, 30 



Diamond Rock quartzite, 70 



Dicellocephalus hartti, 42 

 tribulis, 42 



Dicellograptus sextans, 92 



Dicranograptus contortus, 93 

 nicholsoni, 50, 96, 97, 99 

 ramosus, 91, 92 



Dictyonema flabelliforme, 72, 74 



Didymograptus Sagittarius, 92 

 sagitticaulis, 92 

 subtenuis, 91, 92 



Dikes, 21, 23, 27, 28-30 



Dinorthis pectinella, 47 



Diorite, 28 



Diplograptus cf. acutus, 91 

 amplexicaulis, 50, 88, 93, 97, 98, 99 



var. pertenuis, 97, 98, 99 

 (Mesograptus) mohawkensis, 50 

 (Mesograptus) putillus, 50, 96, 

 97, 98 



Dolomite, 150-51 



Drainage, 12-13 



Drumlins, 14 



East Galway, 46, 56, 59 



Eastern trough, Paleozoic rocks, (£- 



99 



Eccyliopterus planibasalis, 77 

 planidorsalis, 77 



Economic geology, by H. P. Cush- 

 ing, 148-52 



Eddy Hill grit, 66, 69 



Edrioaster saratogensis, 96 



Elizabethtown quadrangle, 28 



Elliptocephala asaphoides, 66, 72, 

 108 



Emerson, B. K., cited, 118 



Emmons, Ebenezer, cited, 66, 76, 79, 

 108 



Empire Graphite Co., 148 



Eoharpes ottawensis, 97 



Eopolychaetus albaniensis, 50 



Eridotrypa minor, 47 



I 



