CONTENTS 



General considerations page 331 



Introduction 33 1 



Acknowledgements 332 



Material 333 



Previous work ........... 334 



Migrations 339 



The ovaries 34 1 



Size 34i 



Giant ovaries 343 



Morphology 343 



Relations 344 



Graafian follicles 345 



Foetal ovaries 345 



Immature ovaries 345 



Adult ovaries 347 



Primary follicles 347 



'Recently ovulated' females 347 



Pregnant females 34 8 



Lactating females 349 



'Resting' females 35° 



Ovarian cysts 35 1 



Conclusions 35 l 



The corpus luteum 35 2 



Formation of the corpus luteum 353 



Bilateral activity of the ovaries 355 



The corpus luteum of ovulation 35*> 



The corpus luteum of pregnancy 35° 



Size 35 6 



Morphology 35 8 



Vesicular corpora lutea 359 



Accessory corpora lutea ......... 3" 1 



Conclusions 3" 2 



Corpora albicantia, corpora aberrantia and corpora atretica . . 363 



The corpus albicans 3^3 



Morphological types 3^4 



Age groups of normal corpora albicantia 366 



Persistence of corpora albicantia 3^9 



Accumulation of corpora albicantia 37^ 



Corpora aberrantia ........•• 3°° 



Corpora atretica 3° 2 



Conclusions 3°3 



Accumulation of corpora up to the attainment of physical maturity 385 



The frequency of corpora in early baleen groups 385 



The number of corpora at the attainment of physical maturity . .386 



Material and methods 3 8 7 



Results 3 88 



Comparisons between the number of corpora in young age groups and at 



physical maturity 39 2 



