INDEX TO EURYPTERIDA OF NEW YORK 625 
Protichnites, 85 
Protolimulus eriensis, 140 
figure, 140 
Pseudoniscus, 20, 112 
Pteraspis, 84, 357 
(Palaeaspis) americana, 97 
Pterichthys, 82 
Pterinea, 99 
subplana, 99 
Pterygotidae, 129, 151, 329; fragments, 
figures, 417 
- Pterygotus, 14, 15, 17, 18, 20, 21, 23, 26, 
27, 29, 31, 35, 36, 44, 50, 51, 55, 58; 
59, G0, 61, 63, 64, 65, 67, 69, 70, 71, 
76, 77, 82, 83, 88, 90, 91, 93, 95, 113, 
I14, 116, 117, 120, 124, 125, 126, 127, 
128, 129, 130, 135, 142, I5I, 157, 173, 
202, 204, 233, 234, 243, 200, 261, 265, 
272, 275, 284, 300, 314, 321, 329, 330, 
331, 332, 333, 334, 339; 348-50, 357» 
359, 306, 372, 374, 375) 370, 377; 379, 
381, 383, 384, 401, 406, 419, 429; 
homology of lateral eye in, 36; 
morphology and formation of the 
chelicerae, 44; disjecta membra from 
the Frankfort shale, 383° 
Sp., 89, 356, 358, 380 | 
acuticaudatus, 16, 358, 359, 360, 362 
anglicus, 46, 61, 63, 71, 95, 127, 204, 
333, 348, 352, 356, 358, 364, 370, 
372, 373, 383 
figure, 348 | 
atlanticus, 89, 151, 350, 356-58, 431 
(Erettopterus) banksii, 330, 331, 376, 
379, 381 
barrandei, 373 
figure, 373 
(Erettopterus) bilobus, 16, 36, 46, 61, 
63, 331, 333, 348, 350, 358, 360, 362, 
364, 373, 376, 380 
figure, 361 
Pterygotus bohemicus, 373 
buffaloensis, 16, 29, 30, 36, 38, 44, 46, 
56, 89, 92, 117, 118, 151, 202, 204, 
233, 241, 349, 353, 354, 358-71, 3723 
373, 429, 430; 431 
figures, 360, 366 
chelicera, 385 
cobbi, 15, 89, 92, 151, 349, 353, 359, 302, 
364, 370, 371-74, 380, 381, 431 
var. juvenis, 429-30, 431 
figures, 429, 430 
cummingsi, 15, 358, 359, 362, 371, 372 
figure, 360 
globicaudatus, 16, 201, 202, 204, 205, 
359 
figures, 202, 203 
(Erettopterus) globiceps, 88, I15, 117, 
123, 151, 349, 350, 374-78, 418, 419, 
431 
grandis, 89, 92, 151, 349, 350, 379-80, 
431 
ludensis, 113 
macrocephalus, 359 
macrophthalmus, 15, 36, 44, 46, 56, 89, 
92, 114, I15, 117, 152, 333, 349, 350-56, 
358, 362, 363, 364, '370, 371, 372, 373; 
376, 380, 381, 429, 430, 431 
minor, 406 
monroensis, 20, 87, 152, 349, 380-81, 
431 
(Eusarcus) nasutus, 22, 86, 152, 349, 
382, 412, 414, 416, 431 
figures, 416 
normanskillensis, 416-17, 431 
figure, 416 
osborni, 15, 331, 349, 350, 353, 354, 355, 
359 
osiliensis, 17, 46, 63, 64, 262, 333, 348, 
352, 353, 356, 364, 366 
otisius, 270 
prolificus, 22, 86, 152, 349, 382-83, 384, 
A431 
