CONTENTS XV11 



The significance of endocrine quality in relation to physical type in Boston 



terrier-dachshund hybrids 440 



The inheritance of contrasted histologic patterns of the thyroid and 

 their correlation with physical types in Boston terrier-dachshund 



hybrids 440 



The nature of the pituitary glands in the Boston terrier-dachshund 

 cross and their possible bearing on modifications of the thyroid 



and gross structural deformity 447 



The histopathology of the pituitary in the Fj generation of Boston 



terrier-dachshund hybrids 458 



The possible relation of differences in pituitary structure to differences 

 in physical type among the F 2 hybrids of the Boston terrier- 

 dachshund cross 461 



The histologic patterns of the pituitary glands in the backcrosses 



between F t hybrids and the two parental stocks 470 



Developmental arrests and the quality of differentiation in the para- 

 thyroid glands of Boston terrier-dachshund crosses 475 



Summary and deductions 489 



Further tests on the significance of endocrinic quality in relation to physical 



type as supplied by bassethound-bulldog hybrids 491 



The inheritance of contrasted histologic qualities of thyroid glands and 

 their correlation with physical types in bassethound-bulldog 

 hybrids 492 



The histologic quality of the pituitary glands in the bassethound-bulldog 

 hybrids and the possible relations to morphologic distortions and 

 modifications in the histologic quality of the thyroid 500 



The quality of parathyroid glands in the bassethound-bulldog cross and 



the possible relations to modifications in skeletal growth 514 



SECTION VI 



W. T. JAMES 

 MORPHOLOGIC FORM AND ITS RELATION TO BEHAVIOR 



Introduction 525 



Method 529 



The experimental situation and equipment 531 



Analysis of behavior in the conditioned food taking situation 535 



Characteristics of the lethargic mode of performance, group A 539 



Eeactions of the lethargic group to negative signals 547 



Eeactions of the lethargic group to intense auditory stimuli 549 



Eeactions of the lethargic group to other signals 549 



Summary 552 



