CONTENTS 



1914 



Xo. 1. MARCH 



Franklin Paradise Johnson. The development of the rectum in the 



human embryo. Twenty-five figures 1 



B. F. Kingsbury. The interstitial cells of the mammalian ovarj-: F(>lis 



(lomestica. Sixteen figures 59 



S. Walter Hanson. The tract of Lissaucr and the substantia gelatinosa 



Rolandi. Eleven figures 97 



No. 2. MAY 



Victor E. Emmel. Concerning certain cytological characteristics of the 

 erythroblasts in the pig embryo and the origin of non-nucleated erythro- 

 cytes by a process of cytoplasmic constriction. Five plates (forty-five 

 figures) 127 



George W. Corner. The structural unit and growth of the pancreas of 



the pig. Nineteen figures 207 



Davenport Hooker. Amoeboid movement in the corial melanophores of 



Rana. Three figures 237 



.Shinkishi Hatai. On the weight of the thynuis gland of the albino rat. 



(Mus norvegicus albinus) according to age. One figure 251 



No. ^. JULY 



George 8. Huntington. The development of the mammalian jugular 

 lymj)h sac, of the tributary jjrimitive ulnar lymphatic and of the thor- 

 acic ducts from the viewpoint of recent investigations of vertebrate 

 lymphatic ontogeny, together with a consideration of the genetic rela- 

 tions of lymphatic and haemal vascular channels in the embryos of 

 Anmiotes. Twenty figures 259 



CiL\RLES Clifford Macklin. I. The skul! of a human fetus of 40 nun. 



Eighteen figures 317 



No. 4. SEPTEMBER 



Charles Clifford Macklin. II. The skull of a human fetus of 40 mm. . . 387 

 C. R. Bardeen. The critical period in the development of the intestines. 



Eleven figures (four plates) 427 



John Louis Bremer. The earliest blood-vessels in man. Eleven figures. . 447 

 Arthur William Meyer. Retrogressive changes in the fetal vessels and 



the suspensory ligament of the liver. Twenty-si.\' figures 477 



