CONTENTS. 



PAGE 



No. 65. Direct growth of veins by sprouting. By Florence R. Sabin (1 plate) 1-10 



66. Origin of the pulmonary vessels in the chick. By Charles Elbert Buell Jr. 



(2 plates) 11-26 



67. The circulation of the bone-marrow. By Charles A. Doan (1 plate, 3 text- 



figures) 27-45 



68. Transformation of the aortic-arch system during the development of the human 



embryo. By E. D. Congdon (3 plates, 28 text-figures) 47-110 



69. Development of the auricle in the human embryo. By George L. Streeter 



(6 plates, 8 text-figures) 111-138 



70. The development of the principal arterial stems in the forelimb of the pig. By 



H. H. Woollard (2 plates) 139-154 



71. The development of the subcutaneous vascular plexus in the head of the human 



embryo. By Ellen B. Finley (2 plates, 1 text-figure) 155-161 



iii 



^J/v 



