482 New York State Museum 



Serpentine, 207 

 Sertularians, 136, 145 

 Shales, 22, 23, 31, 36, 37 



black. 37 



calcareous, 36 



carbonaceous, 37 



coal, 37 



oil, 37 



pyrite, 36 



red, 36 



silicious, 36 

 Sharks, 423 

 Sharon shale, 428 

 Shawangunk conglomerate, 333 

 Shelford, V. E. & Towler, E. D., cited, 182, 454 

 Shell conglomerates, 32 

 Shellfish, 172 

 Shelly bottoms, 175 

 Sherburne flags, 403 



Sherzer, W. H. & Grabau, A. W., cited, 353, 454 

 Shimer, H. W., cited, 353, 418, 454 

 Shore turbellarians, 96 

 Shove, 56 

 Shrimp, common, 161, 163, 170, 175 



feather-footed, 170, 171 



green, 163 



mantis, 170, 171 

 Shumla sandstone, 407 

 Silica, 23 

 Sills, 63 

 Silurian period, 300 



climate, 313 



fossils, 349 



geology, 301 



life, 308 



literature, 353 



New York formations, 315 

 Silurian system, classification, 317 

 Siphonophores, 174 

 Skaneateles shale, 391, 392 



