rugge, J., 44 f.n., 65 f.n.

Koelliker, A.--
On C. F. Wolff, 119
Vertebral Theory of Skull, 157
Membrane and Cartilage Bones, 164-6, 310
Embryological Criterion, 165-6
Cell-division, 187
Intrinsic Laws of Evolution, 243, 356
Saltatory Variation, 243

Kowalevsky, A., 269-71, 284, 285, 299, 300
Development of Amphioxus, 270
Ascidians, 270-1
Coelom, 270, 295, 297
Gastrula, 288

Kowalevsky, V. O., 361-2

Krause, 176

Kupffer, 271

LACAZE-DUTHIERS, H. de, 203 f.n., 315-6
On Ascidians, 271, 273

Lamarck, 44, 66, 78, 215-29
Relation to Buffon, 215
Scale of Beings, 215-8, 220-1, 227-8
As Evolutionary, 218, 220
Classification, 216-7, 227, 228
Species Problem, 216, 227
Materialism, 218-9, 222-3, 225-6
Psychological Vitalism, 219, 220-6, 307, 335
_Sentiment interieur_, 219-20, 222-3, 225
Ecological Adaptation, 221, 222, 223, 224, 227
Laws of Evolution, 221-5
Transmission of Acquired Characters, 221-2, 224
Subtle Fluids, 222
Use and Disuse, 223-4
Independence of Current Thought, 226-7
Homology and Analogy, 227
Reception of his Theory, 228-9
Lamarck and Butler, 335-7

Lang, A., 301

Lankester, Sir E. Ray, 247
Homology, Homogeny, Homoplasy, and Analogy, 267
_Balanoglossus_ Theory of Vertebrate Descent, 287
Germ-Layer Theory and Phylogenetic Classification, 291
Planula Theory, 295
On Coelom Theory, 296-7, 299 f.n.

Latreille, 86, 100

Laurencet, 64

Lavocat, 203 f.n.

Leeuenhoek, 20, 21, 169

Leibniz, 23, 213, 343

Lereboullet--
Von Baer's Law, 206-8
Germ-layer Theory, 208
Gastrula, 288 f.n.

Leucippus, 16

Leuckart, 193 f.n., 194, 297

Levy, O., 333

Leydig, 187, 188, 275 f.n., 285

Linnaeus, 22

Loeb, J., 333, 347

_Loi de Balancement_. _See_ "Compensation, Law of"

Loven, 186, 196

Lucretius, 16
On the Soul, 222 f.n.

Ludwig, 193, 194, 314

Lyell, Sir C., 228 f.n.

Lyonnet, 22

MACBRIDE, E. W., 287 f.n.

M'Kendrick, J.--
On Fontana, 172

Mackenzie, W., 345

Malpighi, M., 20-1, 113, 169

Marine Zoology, Rise of, 195-6

Materialistic Attitude, 246-7, 345, 364
Schwann, 180-5
Vogt, 190-1
Virchow, 191
Ludwig, 193
Materialistic Physiology, 193-4, 314-5, 347
Lamarck, 218-9, 222-3, 225-6
The Darwinians, 241, 308
Haeckel, 248, 250
Roux, 315, 317, 318-9, 329
Semon, 343
Rignano, 344
Loeb, 347
Criticism of this attitude--
Reichert, 192-3

Meckel, D.