CONTENTS 



No. 1. JANUARY 



H. Hays Bullard. On the occurrence and physiological significance of fat in the mus- 

 cle fibers of the normal myocardium and atrio-ventricular system (bundle of His), 

 interstitial granules (mitochondria) and phospholipines in cardiac muscle. Sixteen 

 figures 1 



R. R. Bensley. The normal mode of secretion in the thyroid gland. One plate in 



color 37 



R, R. Bensley. The influence of diet and iodides on the hyperplasia of the thyroid 



gland of opossums in captivity 57 



George L. Streeter. The vascular drainage of the endolymphatic sac and its topo- 

 graphical relation to the transverse sinus in the human embryo. Six figures 67 



L. BoLK. Problems of human dentition. Twenty-eight figures 91 



No. 2. MARCH 



M.R.King. The sino-ventricular system as demonstrated by the injection method. 

 Sixteen figures (five plates) 149 



John Lewis Bremer. The interrelations of the mesonephros, kidney, and placenta in 



different classes of animals. Twelve figures (two plates) 179 



E. A. Baumgartner. The development of the liver and pancreas in Amblystoma punc- 

 tatum. Forty-six figures (four plates) 211 



H. E. Jordan. The microscopic structure of the yolk-sac of the pig embryo, with special 



reference to the origin of the erythrocytes. Thirty-five figures (two plates) 277 



C. M. Jackson. Effects of inanition upon the structure of the thyroid and parathyroid 



glands of the albino rat. Fourteen figures 305 



No. 3. MAY 



J. A. Myers. Studies on the mammary glands. I. The growth and distribution of the 

 milk-ducts and the development of the nipple in the albino rat from birth to ten 

 weeks of age 353 



C. H. Danforth. The relation of corouarj- and hepatic arteries in the common gouoids. 



Four figures 391 



Victor K. Emmel. The cell clusters in the dorsal aorta of mammalian enil)ryos. Eleven 



figures (two plates) -101 



I E. V. CowDRY'. The general functional significance of mitochondria 423 



William A. Locy and Olof Larsell. The embryology of the bird's lung. Based on 



observations of the domestic fowl. Part I. Sixty-eight figures 447 



iii 



