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Spirorbis, 111
Strabops, 31, 35, 68, 69, 86, 119, 120, 122, 123, 124, 125, 126, 127, 128, 129, 130, 140, 148, 151, 152, 186, 322, 410
thacheri, 19, 85, 98, 124, 151, '152–55, 431
figure, 153
Strabops stage, 123, 124
Strauss-Durkheim, cited, 136
Streptelasma rusticum, 325
Stylonurus (Ctenopterus) 18, 20, 21, 23, 30, 31, 33, 34, 35, 43, 44, 48, 49, 50, 51, 58, 59, 65, 69, 70, 76, 80, 81, 83, 84, 88, 90, 94, 110, 113, 116, 120, 126, 128, 129, 130, 132, 133, 134, 151, 212, 230, 259, 260, 261, 262, 278–88, 286, 297, 300, 312, 316, 318, 321, 322, 329, 384
sp., 18, 88, 151, 312–14, 419
beecheri, 89, 94, 151, 288, 292, 310–11, 431
figure, 310
bembycoides, 288
cestrotus, 33, 49, 88, 151, 279, 280, 282, 284, 285, 286, 287, 288–91, 292, 294, 297, 312, 314, 431
elegans, 50, 279, 280, 282, 285, 286, 287
figure, 280
ensiformis, 288
excelsior, 16, 17, 19, 43, 81, 89, 94, 95, 113, 134, 151, 278, 279, 282, 284, 285, 286, 287, 288, 291, 292–95, 306, 313, 378, 408, 431
figures, 293, 294
lacoanus, 19, 292
limbatus, 22, 86, 151, 288, 295–97, 431
lobatus, 288
logani, 50, 278, 279, 282, 284, 285, 286, 287, 292
figure, 281
Stylonurus longicaudatus, 288, 431
macrophthalmus, 278, 279, 280, 282, 285, 286, 287, 318
figure, 283
megalops, 288, 295, 302
modestus, 415, 431
figure, 415
multispinosus, 20, 87, 151, 286, 287, 297–300, 431
myops, 34, 88, 116, 117, 118, 119, 123, 136, 151, 260, 288, 295, 296, 300–9, 312, 313, 418, 419, 431
ornatus, 282, 286, 287
pentlandicus, 288
powriei, 278, 279, 280, 287, 292, 302
figure, 348
scabrosus, 287
scoticus, 50, 70, 279, 285, 287, 295, 302, 303, 3l3
simonsoni, 230
symondsi, 278, 288
wrightiana, 311
wrightianus, 89, 94, 311–12, 431
figures, 312
Swimming feet, 71
Swimming legs, 51

Table of Eurypterida, 149–52
Tail, 68–71
Tarsopterus, 287
Taxonomic relations of eurypterids, 135–49
Terminology, 23
Thelypbonidae, 125
Thelyphonus, 61, 62, 66, 141, 142
Thorell, T., cited, 136, 138, 143, 388, 390, 391, 393, 394, 397, 400, 435
Triartbrus becki, 11
Trilobites, 147, 148
Twenhofel, W. H., cited, 439