[Studies of oogenesis in Bufo arenarum (author's transl)].

Based on a series of macroscopic and histological observations, during an annual cycle, the main stages of oogenesis in Bufo arenarum (Hensel) have been recognized, pointing out the most significant features. The analysis has established five characteristic stages which permit the individualization of the maturation stage of the oocyte in the ovary. All the information obtained has provided the possibility of drawing up a synthetic table so that the oogenetic stages of this amphibian species, very much used in Argentine experimentation, could be easily recognized.