INDEX 



461 



Coordination in animals, 181-202; 

 chemical, 181-183; by nervous 

 system, 183-193 



Copulatory organs, 182, 152, 205 



Coracoid, 141, 144 



Corm, 70 



Cornea, 201 



Corolla, 75, 107 



Correlation of structure and func- 

 tion, 393 



Cortex, 60, 77, 79, 81 



Cortical system, 76 



Cotyledons, 66, 87 



Cranial nerves, 188, 190 



Cranium, 148-153 



Crayfish, 129-135, 169, 415; ap- 

 pendages, 132, 353; circulatory 

 system, 131 ; copulatory organs, 

 132, 205; dissection of, 131; 

 feeding instincts, 342 



Cretin, 182 



Crop, of Earthworm, 123', of Bird, 

 151 



Crossing-over, 262; mechanism 

 296 



Crura cerebri, 188 



Crustacea, 117, 415 (see Crayfish) 



Cursorial, 314 



Curve of probability, 299-305 



Cutaneous senses, 195 



Cuvier, 392-394: 



Cyclostomes, 179, 416 



Cynthia, 254, 259, 415 



Cytology, 4, 287, 403 



Cytoplasm, 24-27 



Cytoplasmic differentiation, 257, 

 258, 259; organization, 254; 

 zones, 259 



Cytotoxin, 339 



Dahlia, 65 

 Daltonism, 294 

 Dandelion, 65 



D 



Darwin, C., 262,271, 299,369, 374- 

 376, 378, 410, 411, frontispiece 



Darwin, E., 209, 408 



Darwinism, present status, 378 



Dead-leaf Butterfly, 321 



Dentalium, 254, 259, 415; devel- 

 opment, 257 



Dermal system, 76 



Dermis, human, 139 



Descent with modification (see 

 Evolution) 



Dextrin, 13 



Diapheromera, 322 



Diaphragm, 140, 153, 155 



Dicotyledons, 82, 414 



Diencephalon, 187, 188 



Digestion, 42, 87, 157-160, 395 



Digitigrade, 316 



Digits, 144, 361 



Dihybrid, 276-280 



Dinosaur, 116, 416 



Dioscorides, 382 



Diploid number, 229, 234, 235 



Disease, inheritance of, 267 



Distribution, 368-372; discon- 

 tinuous, 368 



Division of labor, physiological, 

 28, 57, 117, 324 



Dodder, 68 



Dogfish, 164, 416 



Dominance, 272, 282, 286; in- 

 complete, 283; lack of, 283 



Dorsal aorta, 137, 150, 151, 166 



Dorsal root, 192 



Ductless glands, 159 



Ducts, of glands, 151, 155, 158; 

 in plant stem, 86 



Dujardin, 7 



Duplex group, 234 



E 



Ear, 196-198 

 Earth, age of, 357 



