INDEX TO LOWER SILURIC SHALES OF MOHAWK VALLEY 147 



Didymograptiis serratulus, 8 

 Dinorthis pectinella, 36 



See also Orthis (Dinorthis) pecti- 

 nella var. semiovalis 

 Diplograptus amplexicaulis, 16, 22, 

 23, 25, 27, 28, 32, 33, 34. 61, 64 

 var. pertenuis, 61 

 cf. angustifolius, 31 

 (Amplexograptus) arctus, 82 

 cf. euglyphus, 33 

 (Mesograptus) foliaceus, 7, 80, 81, 



82, 84 

 foliaceus acutus, 17 



mut. vespertmus, 83 

 (Amplexograptus) macer, 19, 20, 



82 



figures, 83 

 (Mesograptus) mohawkensis, 15, 



l6, 17, l8, 19, 20, 22, 28, 2Q, 32, 

 80-2 



figure, 81 

 peosta, 51, 52 



figure, 83 

 pristis, 81 

 cf. putillus, 16 

 (Mesograptus) putillus 23, 24, 25, 



28, 30, 31, 48, 59. 61, 80 

 quadrimucronatus, 80 



mut. cornutus, 63 

 vespertinus, 26, 27, 41, 48, 49, 83 

 Dolgeville, 26 



Dolgeville beds, n, 13, 21, 27 

 Dolgeville section, 27, 28 

 Dolichopterus frankfortensis, 42, 45, 



46, 49 



latifrons, 42, 49 



stellatus, see Eurypterus? (Doli- 

 chopterus?) stellatus 

 Duanesburg, 45, 46 



East Canada creek, 15 

 Echinognathus clevelandi, 50 

 Eden shale, 13, 37 

 ?Edmondia subtruncata, 21 

 Edrioaster, 64, 65 



bigsbyi, 87 



buchianus, 88 



saratogensis, 60, 61, 64, 86-88 

 Elles, G. L., cited, 72, 80 



Elliptocephala undulostriata, 117 

 Emmons, cited, 9, 104, 116 

 Endoceras proteiforme, 21, 48, 113 



var. lineolatum, 113 



var. tenuistriatum, 113 



var. tenuitextum, 113 

 Eoharpes ottawensis, 60, 62, 64, 65, 



116 



Eopolychaetus albaniensis, 30 

 Eridotrypr. mutabilis var. minor, 21 

 Eurychilina, 42, 50 



subradiata, 25, 121 

 var., 22 



cf. subrotunda, 49 

 Eurypterida, 44, 46, 66 

 Eurypterus megalops, 44, 49 



.pristinus, 42, 46, 49 



(Dolichopterus) stellatus, 42, 49 

 Eusarcus longiceps, 42, 49 



triangulatus, 42, 45, 49 

 Explanation of plates, 125-44 



Ferguson creek, 10, 35 



Fisher, cited, 15 



Flat creek, 14, 20, 25 



Flat Gulf, 29 



Foerste, A. F., acknowledgments to, 

 6; cited, 72, 94 



Ford, S. W., cited, 9, 70 



Fort Hunter, 47 



Frankfort, 10, 35 



Frankfort shale, 10, n, 12, 14, 15, 

 34-37, 67; faunule, 12; historical 

 sketch, 7-15; summary of con- 

 clusions, 66; thickness, 9, 10, 13; 

 use of term, 10 



" Frankfort shale " of the lower 

 Mohawk valley, 15, 5, 29, 30, 38 



Fucoidal limestone, see Tribes Hill 

 (fucoidal) limestone 



Fulmer creek, 35 



Gallupville, 55 

 Gansevoort, 32 

 Gebhard, mentioned, 46 

 Glens Falls, 31, 32 



Glens Falls limestone, 25, 34, 39. 65; 

 first use of term, 22 



