762 SUBJECT INDEX 



Dental occlusion, establishment of, 372-376, 375 

 in man and clogs, comparison of, 370-372, 371 

 skull indices related to, 376-382, 377, 378, 379, 380, 381, 383 



Dentition, in various dog breeds, 149-150 



Development, (see growth) 



Discriminating ability, in dogs, 693-694, 744-746 



Disease, and endocrine gland modifications, 399-400, 420-421 



Dog, (all index entries in this study refer to dogs unless otherwise stated) 



association of, with man, 11, 28-29, 70-71 

 breeds, ancient, 29-35 



resemblance of, to modern, 31 



establishment and perpetuation of, 6-7, 36 



general differences in, 9-15 



imported, degeneration of, 34-35 



number of, 9 



origin of, 28-36 



purity of, Fi hybrids as proof of, 53, 72 



survey of, to determine normal ancestral type, 39-41 



value of, in growth studies, 6-7, 12, 22, 37 

 chromosomes in, number of, 140 

 domestication of, 28-29, 31-32 

 genetics of, contributions to, 7-8 

 hairless, 10 



intelligence vs interest in, 71 

 web toes in, 27 

 wolves, crossed with, 32 

 wolves and jackals, similarity to, 32 



Domestication of dog, 28-29, 31-32 



Drosophila, 124, 143 



Dwarfism, in dogs and man, 13-15 



and leg achondroplasia, possible linkage of, 119 

 in mice, 3—5 



tendency toward, in bassethound-English bulldog hybrids, 119-122, 321, 322- 

 325, 323, 324 



£ 



Embryonic growth, (see growth) 



Endocrine glands, (see also parathyroid, pituitary, suprarenal, thymus, thyroid) 

 and behavior, relation of, 526, 633, 637 (see also behavior and conditioned 



reflexes) 

 Frey's study on, 422 

 and genetic constitution, role of, in growth expression, 3-6, 11-12, 17-19, 24, 



26-27, 37, 45-46, 224-225, 296-297, 332-335, 360-361, 399-400, 



475-476 



