942 



INDEX 



Coelomic changes, in amphibians, 867 

 in birds, 867 

 in fishes, 866 

 in reptiles, 867 

 Coelomic covering, of the heart, 703 

 Coelomic tissue, contribution of to urogen- 

 ital system, 772 

 Cole, F. J., 213 



Collagenous fibers, characteristics of, 657 

 Collar cells, of developing contour feather, 



575 

 Collateral ganglia, of autonomic nervous 



system, 837 

 Collecting duct(s), 781 

 of kidney, 772 



formation of in chick embryo, 784 



mesonephric, 778 



metanephric, formation of in mammal 



(human), 784 

 primary, 786 

 straight, 786 

 Collecting tubules, arched, of developing 



mammalian kidney, 786 

 Colon, 630 



Color-pattern production, manner of, 591 

 Coluinba, membranous labyrinth of, 852 

 Coluinbiformes, xix 

 Competence, definition of, 379 



as a function of developmental time se- 

 quence, 380 

 Concrescence, in gastrulation, 397 

 Conductivity, 814 

 Conklin, E. G., 224. 287, 288, 353. 404. 



502 

 Connective tissues, characteristics of, 656 

 fibrous, formation of, 663 



types of, 657 

 kinds of, 656 

 loose, 663 

 mucoid, 663 

 proper, 656 



formation of, 663 

 soft, types of, 657 

 Contractility, a generalized property of 



living matter, 700 

 Contraction wave, of heart beat, 754 

 Conus, 759 



Conus arteriosus, of developing Squalus 

 heart, 752 

 of frog heart, 752 

 Convergence, 551 

 definition of, 396 



during gastrulation, 396 

 Cooper, E. R. A.. 885 

 Coordinating center, of nervous system, 



807 

 Copula, of mammalian tongue, 605 



Copula protuberance, of developing bird 



tongue, 604 

 Copulation path, female, 239 



of sperm and egg in Styela. 247 

 Copulatory organs, extensible, in reptiles, 



mammals, and some birds, 191 

 Coracoid, 693 

 Cord, spermatic, 19 

 Corium, 556 

 Cornea, 846 



development of, 849 

 Corner, G. W., 5, 499 

 Corona radiata, dispersal by hyaluronidase, 



229 

 Coronary ligament, 864. 866 



of liver, 873 

 Coronary sinus, of mammalian embryo, 



747 

 Corpora bigemina, 822 

 Corpora quadrigemina, 822 

 Corpus albicans, 85 

 Corpus hemorrhagicum, 84 

 Corpus luteum, differentiation of, in the 

 snake, 84 



effect on growth of egg follicle, 81 



formation of, 83 



hormone of, 89 



of opossum, 84 



of ovulation, 85 



of platypus, Ornithorhynchus, 84 



of pregnancy, 85 

 Corpus sterni, 687 

 Cortex, of hair shaft, 582 



of ovary, 58 



position occupied by primitive germ 



cells, 68 

 primary, formation of, 795 

 secondary, formation of, 796 

 Cortexin, 890 

 Corti, organ of, 855 



Cortical changes, importance of during fer- 

 tilization, 239 

 Cortical field, a gonadal sex field, 889 

 Cortical granules, action of in formation of 



fertilization membrane, 237 

 Cortical zone, of adrenal gland, 883 

 Cotyledons, 918, 922 

 Cow, horn of, 586 

 Cowper's glands, 802 

 Craig-Bennett, A., 46 

 Cranial ganglia, 812 

 Cranial nerves (see Nerves, cranial) 

 Craniosacral autonomic system, 836 

 Cranium, proper, 668 

 Crista, of semicircular canals, 854 

 Crocodila. xviii 

 Crocodilia, gastralia of, 697 

 Crocodylits acutus, xviii 



