. Zoology : for students and general readers . Zoology. NERVOUS SYSTEM OF INSECTS. 339 the antennal nerves (Fig. 281, at). Tlie simple brain of the locust may be compared with the more complicated brain of an ant, as seen in Fig. 284. The infra-oesophageal ganglion (Fig. 283, if), as its name implies, lies under the oesophagus at the base of the head, un-. Fig. 284.—^Right half of an ant's-brain: UG^ infra-cesophao;eal ganglion; Gr, brain; C, central connective portions ; W, semi-circular bodies of the smail-celled portion of tlie brain lyinti next to tile basal portion of the brain, from whic
. Zoology : for students and general readers . Zoology. NERVOUS SYSTEM OF INSECTS. 339 the antennal nerves (Fig. 281, at). Tlie simple brain of the locust may be compared with the more complicated brain of an ant, as seen in Fig. 284. The infra-oesophageal ganglion (Fig. 283, if), as its name implies, lies under the oesophagus at the base of the head, un-. Fig. 284.—^Right half of an ant's-brain: UG^ infra-cesophao;eal ganglion; Gr, brain; C, central connective portions ; W, semi-circular bodies of the smail-celled portion of tlie brain lyinti next to tile basal portion of the brain, from which the nerves to the pimple eyes {au) arise ; Am, optic lobes ; An, antennal lobes (the bodies appearing like cells are rounded masses of the network of the substance of the cord ; r, cellu- lar cortical substance of the brain; ko, twofold body of the commissure connecting the brain with the iofra-cesophageal ganglion.—After Leydig, from Graber. der a bridge of chitine, and directly behind the tongue. It is connected with the supra-cesophageal ganglion by two com- missures passing up each side of the oesophagus. From the under side of the infra-cesophageal ganglion arise three pairs of nerves, which are distributed to the mandibles,. 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 Packard, A. S. (Alpheus Spring), 1839-1905. New York : Henry Holt
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectzoology, bookyear1879
