. The embryology of the honey bee. Honeybee; Bees. i48 THE EMBRYOLOGY OF THE HONEY BEE StgGng. SoeCom Fig. 55. Transverse section through head of embryo, Stage XI-XII, showing the formation of the suboesophageal commissure (SoeCom) and the stomatogastric ganglion (StgGng), x 387. the brain rudiment (Fig. 55). These clefts then widen out and become occupied by the fibres (Fig. 56). While the greater portion of the brain is formed by neuroblasts, parts of both the deuto- and protocerebrum are not formed in this way. These exceptions include the optic lobes, whose develop- ment will be described
. The embryology of the honey bee. Honeybee; Bees. i48 THE EMBRYOLOGY OF THE HONEY BEE StgGng. SoeCom Fig. 55. Transverse section through head of embryo, Stage XI-XII, showing the formation of the suboesophageal commissure (SoeCom) and the stomatogastric ganglion (StgGng), x 387. the brain rudiment (Fig. 55). These clefts then widen out and become occupied by the fibres (Fig. 56). While the greater portion of the brain is formed by neuroblasts, parts of both the deuto- and protocerebrum are not formed in this way. These exceptions include the optic lobes, whose develop- ment will be described later, and a pair of small groups of pris- matic cells, situated, when first seen, one on each side, just above the base of the antennal rudiment. These groups of cells become plainly noticeable at Stage XI as a subspherical cluster of large prismatic cells (Figs. 55, and 57, y). They apparently do not divide, at least up to the time of the hatching of the larva, but are covered over by the hypodermis derived from the base of the antennal rudiment as shown in figure 57. At Stage XV they are readily recognizable as a spherical group of relatively large cells lying embedded in the deutocerebrum close to its outer sur- face (Fig. 41, y). The optic lobes of the insect brain constitute the first, and with. 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
