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Eurypterus stevensoni, 217
figure, 221
stylus, 90, 150, 155, 161, 221, 425
Eurysoma, 18, 228
newlini, 228, 245
figure, 246
Eusarcus, 18, 20, 21, 23, 28, 30, 31, 35, 40, 41, 42, 43, 44, 50, 51, 55, 58, 59, 64, 67, 68, 70, 76, 77, 78, 90, 94, 116, 120, 126, 127, 128, 129, 135, 150, 226–33, 257, 260, 329, 384, 399, 400, 402, 420
acrocephalus, 231
cicerops, 87, 115, 116, 123, 150, 253–57, 424, 431
giganteus, 231
grandis, 15, 233
ingens, 231, 247, 249, 252
linguatus, 413–14', 416, 425, 431
figure, 414
longiceps, 22, 86, 150, 231, 257, 431
nasutus, 424
newlini, 69, 87, 150, 231, 245–53, 431
table of measurements, 252
obesus, 231, 232
figure, 230
punctatus, 231
figure, 230
raniceps, 231
scorpioides, 230, 231, 232, 399
scorpionis, 15, 16, 26, 44, 89, 92, 114, 115, 116, 150, 226, 228, 230, 231, 233–44, 248, 249, 251, 253, 258, 273, 300, 372, 300, 420, 421, 425, 431
figures, 237, 238, 239, 240, 241
table of measurements, 243
scoticus, 231, 321
simonsoni, 231
triangulatus, 22, 86, 150, 231, 258, 431
vaningeni, 414, 420–25, 431
figures, 422, 423
See also Pterygotus
Explanation of plates, 441–616
Eyes, 35

Fletcher, cited, 357
Foerste, August F., acknowledgments to, 8; cited, 324; description of Megalograptus welchi, 325–29
Fowler, H. W., cited, 74, 439
Fraipont, J., cited, 436
Frankfort shale, 6, 10, 21, 86, 90, 93, 98, 99, 100, 120, 132, 160, 231
Frech, cited, 111
Fritsch, Anton, cited, 142, 143, 222, 388, 390, 392, 394, 396, 397, 398, 438, 439

Galicia, 95, 97
Gaskell, W. H., cited, 27, 57, 61, 66, 126, 149, 436, 439
Gaspé sandstone, 93
Gastropods, 99
Gaurocrinus onealli, 325
Geikie, cited, in
Genesee county, 89
Geologic distribution of eurypterids, 85–113, 431
Girty, cited, 111
Glyptocrinus fornshelli, 325
richardsoni, 325
Glyptoscorpius, 141, 222, 314
Gomphoceras, 99
eos, 325
Grabau, A. W., acknowledgments to, 8; cited, 99
Great Britain, 95, 99, 100
Grenacher, cited, 42
Grote, A. R., cited, 15, 91, 227, 228, 349, 359, 362, 372, 434
Guelph dolomite, 17, 87, 91, 93, 106, 109, 161
Gurley, W. F. E., cited, 18, 437
Gyroceras baeri, 325