Publisher's Synopsis
Excerpt from Parasynaptic Stages in the Testis of Aneides Lugubris (Hallowell)
All the figures are drawn at the same magnification (x 2350) with a Spencer 2mm. Objective, a Zeiss no. 12 compensating ocular, and an Abbe camera lucida. Reduced magnification on plates, 1700 diameters.
Fig. 1. Spermatogonium in the equatorial plate stage, showing twenty-three chromosomes. Fixed in Zenker's ?uid and stained with iron alum haematoxylin and orange G.
Fig. 2. Same stage as above but with the usual number of chromo somes (twenty-eight). Zenker's ?uid, iron-alum haematoxylin, and orange G.
Fig. 3. Spermatocyte before the beginning of polarization. Fixed in Zenker's Solution and stained with phosphotungstic acid haematoxylin.
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