CONTENTS 



No. 1. JULY 



George L. Streeter. The factors involved in the excavation of the cavities in the car- 

 tilaginous capsule of the ear in the human embryo. Twelve figures 1 



L. BoLK. On metopism. Nine figures 27 



Franklin P. Mall. On the frequency of localized anomalies in the human embryos 



and infants at birth. Eighteen figures 49 



Rhoda Erdmann. Cytological observations on the behavior of chicken bone marrow 



in plasma medium. Two text figures and nine plates 73 



Ivan E. Wallin. The relationships and histogenesis of thymus-like structures in Am- 

 mocoetes. Three text figures and four plates 127 



No. 2. SEPTEMBER 



Warren H. Lewis and Margaret R Lewis. Behavior of cross striated muscle in tissue 



cultures. Fourteen figures 169 



J. A, Myers. Studies on the mammary gland. II. The fetal development of the mam- 

 mary gland in the female albino rat. Twelve figures 195 



Charles R. Stockard and George N. Papanicolaou. The existence of a typical oes- 

 trous cycle in the guinea-pig— with a study of its histological and physiological 

 changes. One text figure and nine plates 225 



H. E. Jordan and J. B. Banks. A study of the intercalated discs of the heart of the 



beef. Fifty-one figures (four plates) 285 



No. 3. NOVEMBER 



Aimee S. Vanneman. The early history of the germ cells in the armadillo, Tatusia 



"novemcincta. Three plates and two text figures 341 



E. A. Baumgartner. The development of the serous glands (von Ebner's) of the val- 

 late papillae in man. Ten figures 365 



James Crawford Watt. Anatomy of a seven months' foetus exhibiting bilateral ab- 

 sence of the ulna accompanied by monodactyly (and also Diaphragmatic hernia) 

 Four text figures and four plates 385 



Leslie B. Arey. The normal shape of the mammahan red blood corpuscle. One figure 439 



Andrew T. Rasmussen. Seasonal changes in the interstitial cells of the testis in the 



woodchuck (Marmota monax). Twenty-six figures (three plates) 475 



