Sequence, physiological, in training animals, 209; 210.
Series,
sedimentary, 84, 90, 92;
crystalline or plutonic, 85;
Azoic or Archæan, age of, 92.
Shale, 89.
Shark,
common, most fundamental form, 46;
embryo of, hammerhead;
embryos of, 66.
Sheep, 157.
Simiidæ, 160, 163.
Skate, embryos of, 66.
Snails, 45; shells of, 95; land snails, 103; Hawaiian and Polynesian, 104.
Society Islands, 103.
Solar system, origin of, 84.