626 
Pterygotus quadraticaudatus, 16, 204, 358, 
359, 300, 362, 363 
figures, 361 
raniceps, 228, 229, 331 
Pterygotus-Slimonia group, 383, 409 
Quebec, 94 
Rathbun, Mary J., cited, 75 
Raymond, Percy E., acknowledgments 
to, 8 
Redenbaugh, W. A., cited, 438 
Reed, Mark E., acknowledgments to, 8 
Retsof salt shaft, 108 
Rochester formation, 93 
Roemer, Ferd., cited, 432, 433 
Rondout waterlime, 89, 93, IOI 
Ruedemann, Rudolf, acknowledgments 
to, 7; mentioned, 6, 8, 10; cited, 438 
Russia, 99 , 
Salina formation, 9, 15, 20, 99, I00, 102, 
103, 105, 106, 107-11, 420 
Salt formation, 93 
Salter, J.-W., cited, 14, 36, 45, 55, 63, 75, 
95, 156, 331, 348, 350, 379, 405, 432, 433 
Sarle, C. J., cited, 44, 65, 91, 102, 157, 297, 
300, 329, 339, 331, 332, 333, 334, 335; 
340, 380, 381, 438; mentioned, 6, 9, 20 
Sauquoit, 9 
Scales, 25-29 
Schenectady, 84 
Schenectady basin, Io 
Schenectady county, 86, 90 
Schenectady formation, 10, 411, 420 
Schmidt, Fr., cited, 14, 17, 19, 20, 31, 45, 
46, 47, 48, 56, 60, 61, 62, 64, 95, 135, 
156, 157, 158, I7I, 230, 231, 262, 348, 
352, 435, 436, 438 
Schneider, Philip F., mentioned, 194 
NEW YORK STATE MUSEUM 
Schoharie county, 86, go 
Schuchert, C., cited, 88, 91, 100, 438 
Scorpio, 61, 66, 140, 141, 143 
Scorpionidae, 125, 140 | : 
Scorpions, 125, 127, 147; embryology, 
143; figures, 144, 145; relations to 
Merostomes, 137 
Scottish faunas, 18, 84, 94 
Scudder, S. H., cited, 387, 390, 393, 394, 
395, 396, 435 
Seemann, Fr., cited, 95, 438 
Selaginites, 357 
Semper, M., cited, 95, 230, 437 
Seneca county, 89 
Serrations and spines, 30 
Seward, A. C., cited, 400, 439 
Shawangunk grit, 6, 8, 20, 87, 88, 91, 93, 
102, 105, 113, 161, 255, 257; age, 419; 
in Pennsylvania, eurypterids from, 
417-20 
Shawangunk series, section of, 104 
Sidneyia inexpectans, 4006-7 
Siluric waterlime, 16 
Silurus, defined, 273 
Simpson, cited, III 
Slimonia, 18, 20, 23, 31, 36, 42, 44, 47, 51, 
54, 55, 56, 58, 61, 64, 65, 67, 70, 71, 
70, 77, 94, 120, 126, 128, 129, 130, 157, 
272, 300, 330, 334, 383, 408 
acuminata, 61 
figures, 64, 131 
Smith, Charles, mentioned, 245 
Smithsonian Institution, acknowledg- 
ments to, 7 
South Africa, 95 
South America, 95 
Sphenophyllum thorni, 112 
Sphenothallus, 99 
Spines, 30 
Spirifer, 100 
vanuxemi, 194 
