. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. THE NORMAL AMEBOCYTE IN LIMULUS 451. 1 FIGURE I. Longitudinal section of a Limulus blood amebocyte. In this section the cell is spindle shaped. A longitudinal section cut at right angles to this one would reveal a more oval shape. Note the characteristic large, homogeneous secretory granules. 7000X The minor granules were not observed in all of the amebocytes but were seen often enough and are so unique in their morphology that they cannot be ignored (Figs. 6, 7). The central core of the minor granule is quite dense, more so
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. THE NORMAL AMEBOCYTE IN LIMULUS 451. 1 FIGURE I. Longitudinal section of a Limulus blood amebocyte. In this section the cell is spindle shaped. A longitudinal section cut at right angles to this one would reveal a more oval shape. Note the characteristic large, homogeneous secretory granules. 7000X The minor granules were not observed in all of the amebocytes but were seen often enough and are so unique in their morphology that they cannot be ignored (Figs. 6, 7). The central core of the minor granule is quite dense, more so than the matrix of the major granule. Most characteristic is a relatively clear zone at each end of the ovoid-shaped granule. No recognizable transitional stages of the minor granule were detected. There is no indication of its ultimate fate during blood coagulation. Very dense vesicles are sometimes produced by the Golgi apparatus and very probably contribute to formation of the minor granule. Phase and differential interference contrast microscopic studies of living amebocytes revealed that the major granules have slow random movements. However, the minor granules often appear to move on long, linear paths which may be retraced immediately. Many of the amebocytes have a well developed Golgi apparatus (Fig. 8). Due to the limitations of the plane of sectioning, it cannot be said that all of the amebocytes have an apparatus but indeed they are quite common. We never observed more than one Golgi apparatus in a cell though the cell may become quite large. Sometimes the complex may give rise to aberrant views dependent on plane of section. For example, a well developed apparatus may be curved into funnel shape (Fig. 9). Sections paral- lelling the top of the "funnel" demonstrate a circular or semi-circular stack of mem- branes (Fig. 10). Consequently, sections parallelling the long axis may present what appears to be two separate apparatuses associated at an angle. The
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
