INDEX TO EURYPTERIDA OF NEW YORK 
Dolichopterus otisius, 88, 149, 261, 270-72, 
275, 418, 419, 431 
siluriceps, 89, 92, 149, 228, 259, 261, 
273-74, 431 
stylonuroides, 88, 149, 259, 261, 275, 
276-78, 431 
testudineus, 89, 92, 149, 261, 274-76, 431 
See also Eurypterus . 
Drepanopterus, 18, 35, 44, 48, 49, 70, 76, 
80, 81, 83, 94, 129, 132, 133, 134, 15], 
207, 212, 261, 281, 282, 286, 287, 288, 
200, 314-16, 318 | 
lobatus, 207 | 
longicaudatus, 87, QI, I51, 287, 316-20 
pentlandicus, 207 
figure, 315 
Eastman, C. R., cited, 84 
Echinocaris, 18, 311 
wrightiana, 311 
Echinognathus, 120, 
328, 329, 384 
clevelandi, 16, 21, 86, 98, 149, 287, 300, 
321, 322-24, 328, 408, 431 
Eectognaths, 51 . 
Fichwald, cited, 171 
Embolobranchiata, 137 
Emmelezoe, 20 
Encrinurus punctatus, 99 
Endostoma, 56 
Foscorpioidae, 393 
Eoscorpius, 391 
Equisetides wrightiana, 311 
wrightianus, 18 
Erettopterus, 69, 70, 76, 128, 129, 130, 
350, 376, 377, 379, 384, 410, 419 
See also Pterygotus 
Eria, 95 
Erie county, 89, 92 
Etheridge, R., jr, cited, 217, 221, 434 
Eurypterella, 150 
ornata, 17, 89, 93, 150 
130, 
149, 321-22, 
619 
Eurypterida, history of investigations, 
13-22; relationship with Limulus, 14, 
18, 19, 135; morphology, anatomy and 
terminology, 23-71; diagram of, 24; 
mode of life, 71-85; geological distribu- 
tion and bionomic relations, 85-113, 
431; biologic facies, 90-94; ontogeny, 
113-23; phylogeny, 124-35; taxonomic 
relations, 135-49; resemblance to scor- 
pions, 141; relationship to Crustacea, 
148; possible ancestors of the earliest 
vertebrates, 149; synoptic table, 149- 
52; systematic account, 152-410; sub- 
order Limulava, 406, 407 
Eurypteridae, 130, 149, 152 
Eurypterus, 17, 18, 20, 21, 23, 29, 30, 31, 
32, 33, 34, 35, 36, 40, 41, 42, 43, 44, 
47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 
57, 58, 59, 60, 61, 65, 66, 67, 68, 60, 
70, 70, 77, 78, 79, 80, 81, 90, OI, 94, 
95, 100, IOI, 105, 106, 113, 117, 119, 
120, 124, 125, 126, 127, 128, 129, 
132, 143, 149, 155-61, 181, 182, 183, 
192, 198, I99, 200, 204, 207, 209, 
212, 214, 215, 217, 219, 221, 222, 
227, 232, 233, 239, 240, 259, 260, 
261, 265, 272, 285, 286, 288, 290, 
300, 316, 322, 329, 330, 331, 332, 
333, 334, 339, 340, 349, 363, 306, 
384, 401, 404, 405 | 
figures, 58, 62, 403 
sp., 87 
acrocephalus, 230 
approximatus, 18, 90, 94, 149, 155, 161, 
195-96, 221, 222, 431 
figure, 222 | 
beecheri, 17, 310 
(Tylopterus) boylei, 17, 87, 98, 150, 
155, 158, 159, 161, 216, 218, 431 
figure, 217 
brewsteri, 158, 195 
cestrotus, 288 
