ichat, 29-30
Cuvier, 32-3,
Dujardin, 169, 188
Von Baer, 172
Effect of Invention of Microscope, 20
Relation to Cell-Theory, 169

Delage, 333

Delage and Herouard, 273 f.n.

Delpino, 345

Demaillet, 44

Democritus, 16

Deperet, C, 357
On Cuvier, 43
Absence of intermediary forms in Palaeontology, 358
Phyletic series and Polyphyletism, 360-1

Development, Von Baer's Law--
Aristotle, 14
Von Baer, 124-6
Prevost and Dumas, 125 f.n.
Reichert, 149-50, 351 f.n.
Milne-Edwards, 205-8
Lereboullet, 206-8
Criticised by--
Agassiz, 352-3
His, 353
Sedgwick, 353
O. Hertwig, 354
Phylogenetic Interpretation of--
Darwin, 236-7
Gegenbaur, 266
Relation to Haeckel's Law, 254, 256, 257

Development, Biogenetic Law (Haeckel)--
Haeckel, 251, 253-9, 291-4
F. Mueller, 252-3, 254, 257
Gegenbaur, 262
Roux, 319
Butler, 339-40
Orr, 342
Criticism of--
Vialleton, 348
Oppel, 348-9
Keibel, 349-50
Mehnert, 350-2
O. Hertwig, 352, 354-5
His, 353
Relation to Laws of Meckel-Serres and Von Baer, 254, 256, 257, 303, 309
Relation to Heredity and Development, 312-3
Influence of Causal Morphology, 347-8
Palaeontological Evidence for, 359

Development, Meckel-Serres Law--
Harvey, 18
Hunter, 22
E. Geoffroy, 69-70, 72
Serres, 80-3, 94, 203-4, 205-6
Kielmeyer, Autenrieth, Oken, 90

Development, Meckel-Serres Law-_contd._
Tiedemann, 91
J. F. Meckel, 91-3
K. G. Carus, 94
Criticism of--
Von Baer, 120-3, 304
Cuvier, 129-30, 304
Milne-Edwards, 205
Lereboullet, 206-8
C. Darwin, 233, 236
Analogy with Biogenetic Law, 254-7, 262, 303, 304, 309

Development, Meckel-Serres Law, Theory of Three-fold Parallelism--
L. Agassiz, 230, 255
Tiedemann, Vogt, 255 f.n.
Haeckel, 254-5

Development, The two periods of--
Roux, 320-4, 325, 327, 335
Butler, 337-9

Diogenes of Apollonia, 1

Disintegration. _See_ "Cell-Theory," and "Materialistic Attitude"

Division of Labour, Principle of--
Aristotle, 12
Milne-Edwards, 197-8
Bronn, 202
Gegenbaur, 264

Dohrn, A., 269, 274-8
Annelid Theory of Vertebrate Descent, 274-7, 303
Principle of Function-Change, 276-8, 307
Functional Attitude, 277-8, 307
Formal Attitude, 306

Doellinger, I., 113, 157

Dollo, 311

Donne, 173

D'Orbigny, 43

Driesch, H., 242, 331, 332, 333, 334, 345, 346-7

Duges, A., 86-8, 100, 134, 142,