The Implantation of Additional Hypophyseal Rudiments in Urodele Embryos

Abstract

Hypophyseal rudiments were implanted in urodele (Amblystoma) embryos of the tail bud stage. The development of the transplanted tissue concomitantly with the normal gland gave rise to decided increases in pigmentation, to slowed growth rate, and to changed body proportions. These effects first appeared before feeding and continued until metamorphosis.