L'attività mitotica nel romboencefalo durante lo sviluppo di un Teleosteo viviparo
In the romboencephalon of a developing viviparous Teleost (Gambusia affinis), the mitotic activity slowly decreases and falls at hatching, but rises in young fish; therefore mitoses are present till the end of somatic growth. The mitotic activity is higher in the alar plate than in the basal one: this is due to the late differentiation of the sensitive region. During the growth of the romboencephalon, mitoses rarefy rostrally and, in the oldest embryos they are present only near the calamus owing...