The physiology of the amphibian oviduct has not been investigated sufficiently to give an understanding of the metabolism taking place during the secretion of the jelly membranes.
Although the amphibian oviduct has been well investigated morphologically (Lebrun, 1591 and Miyauchi, '39), a search of the literature failed to reveal information regarding its quantitative glycogen content. Ohohashi ( '24) determined the presence of glycogen in the oviduct of the frog and toad during all seasons of the year but cited no actual values. Several workers have studied the glycogen content of many tissues of various Amphibia (Athanasiu, 1899 ; Bleibtreu, '10 ; Kato, '10 ; Goldfederova, '26 ; Wertheimer, '28). Bleibtreu, working on Rcrna f?-csccc and R a ~z a esczdentn, studied the glycogen content throughout the year in the liver, muscle, skin, central nervous system, and ovary. He observed the glycogen content of the ovary to be at its lowest level in August, after which it rose to a maximum in April at the time of egg-laying.
He found that the glycogen content of the liver at the time of egg-laying was almost zero, and postulated that the increase in the ovaries was largely a t the expense of the liver. He did not determine the glycogen level of the oviduct, which appears to have a relatively high glycogen content. Wert-