Index 481 



Scorpian shell, 99 



Scorpions, 423 



Scott, W. B'., cited, 181, 210, 247, 454 



Scud, 96, 131, 160 



Scutella limestone, 21, 376 



Sea, conditions of life in today, 75 



Sea anemones, see Anemones 



Sea arrows, 174 



Sea blubber, 145 



Sea colander, 90, 120 



Sea cucumbers, 111, 125, 165, 175 



brittle, 149 



purple, 125, 139, 166 



red and crimson, 175, 176 

 Sea cypress, 137 

 Sea-ears, 141 

 Sea-eggs, 139 

 Sea fans, 177 

 Sea feathers, 177 

 Sea lettuce, 120 

 Sea plume, 121 

 Sea slugs, 122, 136, 172 

 Sea squirts, 122, 172, 175, 176 

 Sea water, effects of variability in salinity, 102 

 Sea whips, 177 

 Seaweeds, 18, 82, 88, 89, 107, 118, 120, 121, 133, 163, 232, 259 



brown, 111, 118, 123, 134 



green, 111, 120 



red, 123 

 Sedimentary gneisses, 208 

 Sedimentary rocks, age relations of, 59 



definition, 15 



origin, 16 



places of deposition, 24 



structures, 39, 46 



structures due to deformation, 49 

 Seely, H. M., cited, 300, 443, 444 

 Seneca limestone, 385 

 Senecan, 371 

 Sericite, 75 



