173-86, 248
Physiological Standpoint, 173, 179, 180, 182
Development of Cells, 174-5, 179-80
Cellular Nature of Ovum, 175-7
Development of Tissues from Cells, 177-8
Histology, 178
Materialism and Teleology, 180-3, 185
Cell-metabolism, 182-5
Cells as organic Crystals, 184-5

Sedgwick, A., 347 f.n.
Actinozoan Theory of Vertebrate Descent, 299-300
Metamerism, 299
Embryological Archetype, 300
Organism as Historical Being, 308
Cell-Theory, 346
Von Baer's Law, 353

Segmentation of Ovum, 186-8

Seiler, 138

Selection, Natural and Artificial, 307 f.n.

Self-Differentiation (Roux), 319, 320-1, 322, 323, 324, 327

Self-Regulation (Roux), 319

Semon, R., 342-3

Semper, C., 259, 269, 278-82, 284, 286
Annelid Theory, 274, 278-82
Metamerism, 274, 279, 282
Follower of Geoffroy, 278
Unity of Plan and Composition, 279, 303
Principle of Connections, 279
Formal Attitude, 279

_Sentiment interieur_ (Lamarck), 219-20, 222-3, 225

Serial Homology. _See_ "Metamerism"

Serres, E., 79-83, 91, 100, 205-6, 257 f.n.
Criteria of Homology, 80
Law of parallelism, 80-3, 94, 203-4, 205-6
Law of Multiple Formation, 80-1
Unity of Plan, 83, 205, 206
Teratology, 83
Meckel's Cartilage, 145 f.n.
Transcendentalism, 205-6
Concrescence Theory, 206 f.n.

Severino, 18

Sharpey, 162, 176

Siebold, von, 186

Skull, Development of, 139-62.
_See also_ "Vertebral Theory"

Spallanzani, 315

Species-Problem--
Cuvier, 42
Lamarck, 216, 227
Darwin, 231

Spencer, H., 326 f.n.

Spengel, 285, 287

Spinoza, 343

Spix, 96, 97, 100, 141

Stannius, 165

Steenstrup, 309

Steinmann, G., 357, 360 f.n.

Stensen (Steno), 21

Swammerdam, 20, 21-2

TACHYGENESIS, 359

Technique, Microscopical, 209 f.n., 268

Tectology (Haeckel), 249

Teleology--
Aristotle, 10
Cuvier, 33-5
Kant, 35, 213, 242
Von Baer, 242
Owen, Von Hartmann, 244
Butler, 341
G. Wolff, Driesch, 346
Criticism of--
Goethe, 48
Schwann, 180-2
The Darwinians, 241
Haeckel, 248
Evolutionary Morphologists, 308

Teratology, 69, 83, 91, 93, 315

Thienemann, 23 f.n.

Thompson, D'Arcy W., 2 f.n.

Thomson, A., 176

Thomson, J. Arthur, 215 f.n.

Tiedemann, 91, 113, 215, 255 f.n.

Tissues and Germ-Layers, 118, 209-12

Transcendental Anatomy, Relation to Evolutionary Morphology, 302-8, 312

Transcendentalism, French and German Schools, 89, 100

Trembley