INDEX 



413 



CciitiT of dispersal, 309 

 Centipede, 272 

 Central nervous system, 142 

 Centriole, 26, 27, 60 

 Centrolecithal egg, 199 



cleavage of, 201 

 Centrosome, 27 

 Centrosphere, 26, 27 

 Centrum, 91 

 Cephalochorda, 276, 278 

 Cephalopoda, 271, 272 



biogenetic law in, 256 



evolution of, 343, 344 

 Ceratite, 344 



suture of, 343 

 Ceratium, linear colony in, 67 

 Cerebellum, 152 

 Cerebrum, cortex of, 152 



localization in, 151 

 Cestoda, 265, 266 

 Chaetognatha, 275 

 Chaetopoda, 270 

 Chaetopterus, 270 

 Chain coral, fossil, 327 

 C-hance, directing evolution, 359, 362 

 Chemistry, 30-38 



of living things, 37, 38 

 C^hitin, 88 

 Chiton, 271 



Chlamydomonas, primitive protozoon, 69 

 Chlorine, atom of, 34 



molecule of, 34 

 Chlorophyll, 47 

 Cholesterol, excreted. 138 

 Chordata, 276-280 

 Chromatin, 26 

 Chromosomes, 19, 26, 55, 56, 57, 58, 59 



division of, 59, 60, 63 



doubling number of, 311 



variable size of, 59, 60 



vesiculation of, 59, 60 

 Cilia, 28, 51, 52 

 Ciliata, 261 



Ciliated epithelium, 84 

 Ciliophora, 261 

 Circular canal, 172, 173 

 Circulatory system, 122-132 



human, 125 



open and closed, 122 

 Clam, 271 

 Clasping, by frog, 181, 182 



Class, 245, 248 

 Classification, 11-13 

 Clavicle, 92, 93 

 Clevage, 194, 200, 201, 202 



relation of, to yolk, 201 

 Climate, changes of, in relation to distri- 

 bution, 308 

 Cloaca, 103, 136, 178, 179, 183 

 Cnidoblasts, in Hydra, 72 

 Coagulation, of blood, 130 



failure of, 112 

 Codes of nomenclature, 249 

 Codosiga, dendritic colony in, 67 

 Coelenterata, 262-264 



symmetry ot, 79 

 Coelenteron, 80, 101, 262 

 Coelom, 80, 81, 206, 206, 209, 210, 212 

 Coenosarc, 172, 173 

 Collared cells, in sponge, 52 

 Collared epithelium, 84 

 Collecting tubule, 136, 178 

 Colon, 103 



Colonial theory, 66, 67, 74 

 Colony, defined, 74. 75 



types of, 67-69 

 Colony formation, origin of, 176 

 Columnar epithelium, 84 

 Comanchean, 330, 335 

 Communities, 290-291 

 Complete metamorphosis, 215, 216 

 Compound, 30 

 Compound gland, 84, 85 

 Conjugation, 162, 163, 164 

 Connective tissue, 81 

 Continents, interconnections of, 322, 323 



permanence of, 308 

 Contractile tissue, 81, 85 

 Copulation, 182 



in earthworm, 167 

 Coracoid, 92, 93 

 Coral, 263, 264 



fossil, 332 

 Coral reefs, 303 

 Cornea, in embryo, 213 

 Corpus luteum, 157 

 Cortex, adrenal, 154, 155, 156 



cerebral, 152 

 Cortin, 155 

 Crab, 238 



Cranial nerves, 142, 143 

 Craniosacral nervous system, 147 



