Bulletin of the Museum of Comparative Zoology at Harvard College . one tripartite division. From anold serosa. X 150. Fig. 30. Nucleus of the same, more highly magnified. The chromatin is groupedin granular masses. Two of the daughter nuclei are still united bystrands of the nuclear membrane. X 630l Figs. 31-32. Constricted nuclei from a young serosa. One of the daughter nucleiof each is larger than its mate, and has itself become elongated andconstricted. X 304. Fig. 33. Quadrinucleate cell. The upper of the two original nuclei has dividedin a longitudinal, the lower in a transverse plane. Nu
Bulletin of the Museum of Comparative Zoology at Harvard College . one tripartite division. From anold serosa. X 150. Fig. 30. Nucleus of the same, more highly magnified. The chromatin is groupedin granular masses. Two of the daughter nuclei are still united bystrands of the nuclear membrane. X 630l Figs. 31-32. Constricted nuclei from a young serosa. One of the daughter nucleiof each is larger than its mate, and has itself become elongated andconstricted. X 304. Fig. 33. Quadrinucleate cell. The upper of the two original nuclei has dividedin a longitudinal, the lower in a transverse plane. Nucleus a stillshows a remnant of the connecting thread, and nucleus b retains theconical form it had in division. Both nuclei have rotated 90° fromthe plane of elongation. X 304. Fig. 34. Cell from tlie serosa of a far advanced embrj-o The nuclei have under-gone extreme degeneration. Each nucleus is surrounded by a brightring, outside of which is a broad zone of a radiate structure, morestainable than the rest of the cytoplasm. X 150. JOHXSON ^U^ DiMSlftV.
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Keywords: ., bookcentury1800, bookdecade1860, bookidbullet, booksubjectzoology
