. The embryology of the honey bee. Honeybee; Bees. iS8 THE EMBRYOLOGY OF THE HONEY BEE of this system first make their appearance at Stage IX, but are more sharply marked at Stage X. At this stage three evaginations of the dorsal wall of the stomodeaum wall are visible (Fig. 60).. FtGnr â Meso Fig. 60. Median sagittal section through the stomodaeum of an embryo, Stage X, showing the three evaginations of the dorsal wall of the stomo- daeum which form the stomatogastric system, x 387. On the lower surface of this wall these appear as sharply pointed clefts, on the upper surface as rounded swell
. The embryology of the honey bee. Honeybee; Bees. iS8 THE EMBRYOLOGY OF THE HONEY BEE of this system first make their appearance at Stage IX, but are more sharply marked at Stage X. At this stage three evaginations of the dorsal wall of the stomodeaum wall are visible (Fig. 60).. FtGnr â Meso Fig. 60. Median sagittal section through the stomodaeum of an embryo, Stage X, showing the three evaginations of the dorsal wall of the stomo- daeum which form the stomatogastric system, x 387. On the lower surface of this wall these appear as sharply pointed clefts, on the upper surface as rounded swellings (Fig. 55, FtGng). The first (anteriormost) of these is relatively insignificant, while the other two are very noticeable. The first is situated not far from the end of the labrum, the second close behind the first, while the third is halfway between the second and the point where the oesophagus joins the mid-intestine. The first evagination lib- erates a few scattered ganglion cells which later are found ac- companying the labral nerve, and then quickly disappears. The second forms a large ovoid mass of nerve cells lying just above the oesophagus and between the two halves of the brain, and is easily recognized as the frontal ganglion (Fig. 5,5, FtGng). This mass is at first hollow, with the cavity of the evagination extend- ing up through it, but soon becomes solid. The third mass of. 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 Nelson, James Allen. Princeton : Princeton University Press
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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectbees, bookyear1915
