. Journal of morphology. epi mc P 14 .^^^ -^/ PS pn (S 12 13a ©. 229 THE DEGENERATIONS IN THE SECONDARY SPER-MATOGONIA OF DESMOGNATHUS FUSCA B. F. KINGSBURY and PAULINE E. HIRSHFrom the Histological Laboratory, Cornell University TWENTY-ONE FIGURES In 1902 there was published a part of the results of a studyof the spermatogenesis in Desmognathus fusca in which theoccurrence of degenerations^ in the secondary spermatogoniawas mentioned. A fire had destroyed the larger portion of thepreparations and photographs covering this portion of the sper-matogenetic cycle, and no effort was then made to c
. Journal of morphology. epi mc P 14 .^^^ -^/ PS pn (S 12 13a ©. 229 THE DEGENERATIONS IN THE SECONDARY SPER-MATOGONIA OF DESMOGNATHUS FUSCA B. F. KINGSBURY and PAULINE E. HIRSHFrom the Histological Laboratory, Cornell University TWENTY-ONE FIGURES In 1902 there was published a part of the results of a studyof the spermatogenesis in Desmognathus fusca in which theoccurrence of degenerations^ in the secondary spermatogoniawas mentioned. A fire had destroyed the larger portion of thepreparations and photographs covering this portion of the sper-matogenetic cycle, and no effort was then made to complete theinvestigation by a detailed study of the spermatogonia. Of the degenerations that occurred two were particularly attrac-tive—the regressive changes in the spent lobule and the degener-ations in the last generation of spermatogonia, after the cessa-tion of the seasons transformation into spermatocytes. Thesedegenerations are described as occurring in spermatogonia of thelast generation, although they might quite as well, perhaps, aswill appear subs
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Keywords: ., bookcentury1900, bookdecade1, booksubjectphysiology, bookyear1912
