Part 39

Sea-pen, 182.

Secondary epoch, 66.

Sedgwick, Professor, on past time, 98. opinions of, 17.

Selaginella, 133.

Senses, evidence of, 1.

Serpent, earliest, 68.

Serpula, 198, 305.

Sharks, 52, 58, 243. egg of, 326.

Shells, now fossilizing, 89.

Shore-crab, 216.

Silk-cotton tree, 174.

Silurian formations, 40.

Skeleton, human, 286.

Skeletons, evidence from, 105, 340.

Sloths, fossil, 82.

Smith, Dr. Pye, opinions of, 22.

Smithia, elegance of, 371.

Species, persistence of, 110.

Spider, eggs of, 313.

Stag, 258.

Star-fish, madreporic plate of, 366.

Stars, light from fixed, 361.

Stature of man, 284.

Strata, disturbances of, 54. number of, 37.

Strombus, 230.

Sugar-palm, 141.

Sumner, Dr., opinions of, 19.

Surinam toad, 327.