CONTENTS. 



No. 7. On the fate of the posterior cardinal veins and their relation to the development of the 



vena cava and azygos in the embryo pig. By FLORENCE R. SABIN (7 plates) .... 5-32 



8. Recherches cytologiques sur la fecondation des Ascidiens et sur leur developpement. 



Par J. DUESBERG (3 planches, 12 figures) . 33-70 



9. The histology of the poison-glands of Bufo agua and its bearing upon the formation 



of epinephrin within the glands. By P. G. SHIPLEY and G. B. WISLOCKI (2 plates) 71-90 



