. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 250 F. ET AL. Figure 2. Light micrographs of eggs, developing infusoriform embryos, and fully formed infusoriform embryos otDicyema japonicum. Photomicrographs were taken at magnifications of 2000 diameters under an oil-immersion objective. Scale bar = 1(1 fjm. a. An infusorigen (left) and an oocyte undergoing meiosis (nght). The short arrow indicates the first polar body and the long arrows indicate spermatozoa, b. An oocyte undergoing the second meiotic division. The arrow indicates a spermatozoon, c. An oocyte f
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 250 F. ET AL. Figure 2. Light micrographs of eggs, developing infusoriform embryos, and fully formed infusoriform embryos otDicyema japonicum. Photomicrographs were taken at magnifications of 2000 diameters under an oil-immersion objective. Scale bar = 1(1 fjm. a. An infusorigen (left) and an oocyte undergoing meiosis (nght). The short arrow indicates the first polar body and the long arrows indicate spermatozoa, b. An oocyte undergoing the second meiotic division. The arrow indicates a spermatozoon, c. An oocyte finishing meiosis (center). The arrow indicates the second polar body. d. A fertilized egg at the 2-pronucleus stage, e. Two- cell embryo, f. Four-cell embryo. One blastomere is out of focus, g. Eight-cell embryo. An axial cell nucleus is seen in the lower left corner, h. Twelve-cell embryo (optical section), i. Sixteen-cell embryo (optical section), j. Twenty-four-cell embryo (optical section), k. Twenty-nine-cell embryo (ventral view). The arrows indicate degenerating cells produced after extremely unequal divisions. 1. Twenty-nine-cell embryo (sagittal optical section). The arrow indicates a metaphase figure of 2d:. Two small nuclei in the center are those of germinal cells, r = refringent body. m. Thirty-three-cell embryo (horizontal optical section). Arrows indicate metaphase figures of 2b:" and 2c:". r = refringent body. n. Thirty-six-cell embryo (sagittal optical section). The arrow indicates a telophase figure of 2c212. r = refringent body. o. Fully formed embryo (sagittal optical section), r = refnngent body. p. Fully formed embryo (horizontal optical section). Arrows indicate granules in capsule cells, r = refringent 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
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
