, 22, 315

Treviranus, 141, 170, 215, 225 f.n.

Turpin, 173

Types, Theory of (Cuvier and Von Baer)--
Cuvier, 41, 124, 289, 291
Von Baer, 123-4, 289, 291
Bronn, 202
Lereboullet, 207

Types, Theory of (Cuvier and Von Baer)--_contd._
Criticised by--
E. Geoffroy, 60
Haeckel, 289, 291
Lankester, 291

Type-Theory and Evolution, 304

UNGER, 185

Unity of Composition, Principle of, Geoffroy, 54, 70-2, 75-6, 200, 305

Unity of Plan, 88, 241, 278-9, 303, 312. _See also_ "Archetype"
Aristotle, 6-7, 10
Belon, Severino, 18
Perrault, 19
Robinet, 23
Buffon, 24
Cuvier, 41
Goethe, 45-7, 51
Vicq D'Azyr, 45
Camper, 45, 46
Herder, 46
Kant, 46, 213-4
E. Geoffroy, 52-65, 70 ff.
Serres, 83, 205, 206
Savigny, 83
Audouin, 85-6
Latreille, 86
Duges, 86-7
J. F. Meckel, 101
Milne-Edwards, 197
Semper, 279
Haeckel, 289, 291
Lankester, 291

Unity of Plan as due to Community of Descent--
Darwin, 233, 234-5, 239, 247
Haeckel, 250-1
Gegenbaur, 263 f.n., 265
Criticism of this idea--
O. Hertwig, 355-7

Unity of Plan as Conservative Principle--
E. Geoffroy, 75, 78
Owen, 112
Gegenbaur, 263-4
Evolutionary Morphologists, 307

VALENTIN, 138, 173, 176

Variation, Limits of, Cuvier, 42

Vegetative Repetition of Parts--
Owen, 111, 286
Bateson, 286

Velpeau, 138

Vertebral Theory of Skull, 49, 96-9, 104-6, 131, 141-4, 147-9, 154-7,
161-2, 165, 203, 235, 310 f.n.

Vertebrate Descent, 269-87, 299-301, 304

Verworn, M., 330

Vesalius, 18

Vestigial Organs, 233, 237, 309, 312

Vialleton, L., 306 f.n., 348

Vicq d'Azyr, 45, 95

Virchow, R., 188, 191

Vitalism, Psychological--
Lamarck, 219, 220-6, 307, 335
Butler, 336-41
Orr, Cope, 342
Ward, 343
Delpino, France, Pauly, A. Wagner, Mackenzie, 345

Vogt, C.--
Criticism of Vertebral Theory, 156-7
Capillaries, 179
Segmentation, 186
Materialistic Attitude, 190-1
Threefold Parallelism, 255 f.n.

WAAGEN, 359, 361 f.n.

Wagner, A., 345

Wagner, R., 176

Ward, J., 343

Weber, 138

Weismann, A., 240, 323, 326 f.n., 330-1, 343

Werneck, 173

Whitman, C. O., 346

Wigand, A., 242 f.n., 356

Willey, A., 273 f.n., 306 f.n.

Williamson, 309

Willis, 19

Wilson, E. B., 331, 332-3, 346 f.n., 347 f.n.

Wolff, C. F., 113
Germ-layer Theory, 119-20
Cells, 170

Wolff, G., 346-7

Woodward, B. B., 358

Wotton, E., 17

ZELENY