III.—The Spermatogenesis of the Axolotl (Amblystoma tigrinum)

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Abstract
The material for this work was obtained from the stock of Axolotls which breed in the Zoology Department of Glasgow University. The objection to using captive specimens for cytological work is overridden by the fact that the Axolotl, unlike some other urodeles, breeds readily in captivity, so that the germ-cell cycle can be taken as normal.The reasons for wishing to add yet another account of urodele spermatogenesis to the considerable number already existing are twofold. First, widely different interpretations of a similar process in different species have been put forward, and one of the most recent accounts (Stieve, 1920, on Proteus) is entirely at variance with the usual course of spermatogenesis in urodeles. Second, there has been great discrepancy in the number of chromosomes assigned to this species.

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