- Catenoid, 218, 223, 227, 252
- Causation, 6
- Cavolinia, 573
- Cayley, A., 385
- Celestite, 459
- Cell-theory, 197, 199
- Cells, forms of, 201; sizes of, 35
- Cellular pathology, 200; tissue, artificial, 320
- Cenosphaera, 470
- Centres of force, 156, 196
- Centrosome, 167, 168, 173
- Cephalopods, 548, etc.; eggs of, 378
- Ceratophyllum, growth of, 97
- Ceratorhinus, 612
- Cerebratulus, egg of, 189
- Cerianthus, 125
- Cerithium, 530, 557, 559
- Chabrier, J., 25
- Chabry, L., 30, 306, 415
- Chaetodont fishes, 671, 749
- Chaetopterus, egg of, 195
- Chamois, horns of, 615
- Chapman, Abel, 672
- Chara, 303
- Characters, biological, 196, 727
- Chevron bones, 709
- Chick, hatching of, 108
- Chilomonas, 114
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