. The Biological bulletin. Biology; Zoology; Marine biology. D. ?«• • G Z • H Fig. 2. Galgulus oculatus. A and i?, metaphase figures of the second spermato- cyte division, polar view, showing the ring of fifteen chromosomes and the pentad group in the center — in B, the chromosome beneath the four group could not be shown without displacing it; Cand D, late anaphases of the second division, polar view, showing the unequal distribution of the chromosomes ; E, side view of meta- phase, second division, showing the typical arrangement and position of the pentad group — the spindle in both E and F
. The Biological bulletin. Biology; Zoology; Marine biology. D. ?«• • G Z • H Fig. 2. Galgulus oculatus. A and i?, metaphase figures of the second spermato- cyte division, polar view, showing the ring of fifteen chromosomes and the pentad group in the center — in B, the chromosome beneath the four group could not be shown without displacing it; Cand D, late anaphases of the second division, polar view, showing the unequal distribution of the chromosomes ; E, side view of meta- phase, second division, showing the typical arrangement and position of the pentad group — the spindle in both E and F is diagrammatic and merely shows size rela- tions ; F, side view of the early anaphase, second division, showing the manner in which the chromosomes of the pentad group separate ; G, H and /, early anaphases of the second division, showing the chromosome distribution to the two classes of spermatozoa. All figures are drawn on the same scale and magnified 2,009 diameters. The second division, which follows immediately after the first, shows a remarkable regrouping of certain of the chromosomes. Fifteen of the twenty take up the position of a ring, within which is a definite compound element formed by the remaining Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-; Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report; HighWire Press. Lancaster, Pa. [etc. ] : Lancaster Press, inc. [etc. ]
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectb, booksubjectzoology
