. Journal of morphology. 5 6 Fig. 5 Surface view of the animal hemisphere of an egg of Cryptobranchusallegheniensis ready to leave the ovary, after the rupture of the germinal lightly stippled area indicates the blastodisc. Sketched from the living 7. Fig. 6 Surface view of the animal hemisphere of an egg taken from the uterus,ready for fertilization, showing pit at the center of the blastodisc. Sketched frompreserved material. X 7. The dark spot is sometimes surrounded by a tumid ring, but thiscondition is probably pathological. At the time of the escape of the egg from the

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. Journal of morphology. 5 6 Fig. 5 Surface view of the animal hemisphere of an egg of Cryptobranchusallegheniensis ready to leave the ovary, after the rupture of the germinal lightly stippled area indicates the blastodisc. Sketched from the living 7. Fig. 6 Surface view of the animal hemisphere of an egg taken from the uterus,ready for fertilization, showing pit at the center of the blastodisc. Sketched frompreserved material. X 7. The dark spot is sometimes surrounded by a tumid ring, but thiscondition is probably pathological. At the time of the escape of the egg from the ovary and itspassage through the body cavity and upper oviduct, the egg seemssofter in consistency than at other times. Some fixing solutions,particularly Lavdowskys, which usually preserve perfectly thespherical form of the egg, now fix it as an irregularly-shaped plasticity may be of use to the egg in its escape from theovary and passage down the oviduct. JOURNAL OP MORPHOLOGY, VOL. 23, NO. 1 100 BERTRAM G. S

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Keywords: ., bookcentury1900, bookdecade1, booksubjectphysiology, bookyear1912