. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 140 FERNANDUS PAYNE. division is impossible to say. All the chromosomes divide equally so that each secondary spermatocyte receives 20 chromosomes. No reconstruction period follows. (Fig. 8 and 9 are the same as in the preliminary paper, but Fig. 7 is new with the exception of A.) My former description of the second division seems adequate, and as I have nothing new to add, I will quote it as there described. £* *m ^••> •••„ /«*t • ^90 + % *r<b / *A % * / s *": **« ^ •« •••••• CA -x^iP^ vA\i/,; • • /m\^ «••*. *
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 140 FERNANDUS PAYNE. division is impossible to say. All the chromosomes divide equally so that each secondary spermatocyte receives 20 chromosomes. No reconstruction period follows. (Fig. 8 and 9 are the same as in the preliminary paper, but Fig. 7 is new with the exception of A.) My former description of the second division seems adequate, and as I have nothing new to add, I will quote it as there described. £* *m ^••> •••„ /«*t • ^90 + % *r<b / *A % * / s *": **« ^ •« •••••• CA -x^iP^ vA\i/,; • • /m\^ «••*. * •• N3L ia %;/ \\\\\,//./ \VMi/ //'. -^'^^- ^IW" E FIG. 8. Galastocoris (Galgulus} oculatus Fabr. A and B, metaphase figures of the second spermatocyte division, polar view, showing the ring of 15 chromosomes and the pentad group in the center—in B, the chromosome beneath the four group could not be shown without displacing it; C and D, late anaphases of the second division, polar view, showing the unequal distribution of the chromosomes ; E, side view of the second division, metaphase, showing the typical arrangement and position of the pentad group; F, side view of the early anaphase, second division, showing the manner in which the chromo- somes of the pentad group separate—the spindle in both E and F is diagram- matic ; G, H and /, early anaphases of the second division. All drawings are made on the same scale and magnified 3,105 diameters. The second division which follows immediately after the first, shows a remarkable regrouping of certain of the 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank
Size: 1172px × 2133px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
