CONTENTS 7 0 Riol. Rev. 37 20-2 J. Endocrinol. 17, 158-60. KOHN, R. (1958). Effect of administration of rat serum on rat liver regeneration. Exp. Cell Res. 14, 228-30. Kynarm A. H . English summary.) KUN, H. (1937). The effect of follicle hormone on the skin through local application: histologic studies in infantile and senile rats. Wien Klin. Wschr. 50, 408-1 I . LAHR, E. L. & RIDDLE, 0. (1938). Proliferation of crop sac epithelium in incubating and in prolactininjected pigeons studied with the colchicine method. Amer. J. Physiol. 123, 614-9.