![](yjbm00516-0121.tif "scanned-page"){.279}

![](yjbm00516-0122.tif "scanned-page"){.280}

![](yjbm00516-0123.tif "scanned-page"){.281}

![](yjbm00516-0124.tif "scanned-page"){.282}

![](yjbm00516-0125.tif "scanned-page"){.283}

![](yjbm00516-0126.tif "scanned-page"){.284}

![](yjbm00516-0127.tif "scanned-page"){.284-1}

![](yjbm00516-0128.tif "scanned-page"){.284-2}

[^1]: From the Department of Anatomy and the Adolescence Study Unit, Yale University School of Medicine. This work was aided by grants from the Committee for Research in Problems of Sex, National Research Council (grant made to Prof. Edgar Allen), from the Rockefeller Foundation, from the Fluid Research Fund of Yale University School of Medicine, from the Anna Fuller Fund, and from the Jane Coffin Childs Memorial Fund for Medical Research.
