LIST OF ILLUSTRATIONS 



FIGURE PAGE 



40. The Frequency of the Appearance of Oestrus and/or 

 Corpora Lutea in Immature Rats Receiving Different 

 Doses OF One Preparation of Prolan 219 



41. The Relationship between the Intravenous Dose of One 

 Preparation of Prolan and Ovulation in the Rabbit . 220 



42. The Relationship between the Dose of Pregnant Mare's 

 Serum and Ovarian Weight in Immature Rats . .231 



43. The Effect of the Destruction of the Pars Glandularis 



on the Metamorphosis of the Tadpole 247 



44. The Microscopic Appearance of the Thyroid of the Hypo- 

 physectomized Tadpole 248 



45. Albinism and Lack of Metamorphosis in the Tadpole 

 Following Hypophysectomy 249 



46. The Effect of Hypophysectomy on the Gross Appearance 



OF THE Thyroid of the Rat 2';8 



47. The Effect of Hypophysectomy on the Microscopic Ap- 

 pearance OF the Thyroid of the Rat 259 



48. The Effect of Anterior Pituitary on the Microscopic 

 Appearance of the Thyroid of the Immature Guinea Pig . 262 



49. The Effect of Anterior Pituitary Extract on the Weight 

 OF THE Thyroid and on the Amount and Distribution of 

 Iodine IN the Thyroid AND Blood OF THE Guinea Pig . 267 



50-51. The Effect of Hypophysectomy on the Microscopic 



Appearance OF THE Adrenal OF THE Rat 281,282 



52. The Effect of an Extract of the Pars Intermedia on the 

 Gross Appearance OF THE Skin of THE Frog 309 



53. The Microscopic Appearance of the Melanophores after 



THE Injection of AN Extract OF THE Pars Intermedia . 310 



54. The Effect of the Vasopressor Principle of the Pars 

 Neuralis on the Circulatory System and on the Respira- 

 tory Movements of the Dog 338 



55. The Effect of Posterior-Lobe Extract on the Secretion 



OF Urine and of Chlorides in the Urine 355 



