INDEX TO EURYPTERIDA OF NEW YORK 627 
Spirorbis, III 
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, I51, 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, IIO, 113, 116, 120, 126, 
128, 129, 130, 132, 133, 134, I51, 212, 
230, 259, 260, 261, 262, 278-88, 286, 
297, 300, 312, 316, 318, 321, 322, 320, 
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, I51, 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, 202 
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, I19, 123, 
136, 151, 260, 288, 295, 296, 300-9, 
312, 313, 418, 419, 431 
ornatus, 282, 286, 287 
pentlandicus, 288 
powrilel, 278, 279, 280, 287, 292, 302 
figure, 348 
scabrosus, 287 
scoticus, 50, 70, 279, 285, 287, 295, 302, 
_ 393, 313 
simonsoni, 230 
symondsi, 278, 288 
wrightiana, 311 
wrightianus, 89, 94, 311-12, 431 
figures, 312 
Swimming feet, 71 
Owimming legs, 51 
Table of Eurypterida, 149-52 
Tail, 68-71 
Tarsopterus, 287 | 
Taxonomic relations of eurypterids, 135- 
49 
Terminology, 23 
Thelyphonidae, 125 
Thelyphonus, 61, 62, 66, 141, 142 
Thorell, T., cited, 136, 138, 143, 388, 390, 
391, 393, 394; 397, 400, 435 
Triarthrus becki, I1 
Trilobites, 147, 148 
Twenhofel, W. H., cited, 439 
