. The brain as an organ of mind. Brain; Thought and thinking; Brain. 94 THE NERVOUS SYSTEM OF ARTHROPODS. likely to be associated with greater brain development and with higher or more complex brain functions. Among the low^er Myriapods, such as lulus and Geophi- lus, in which the limbs, though very numerous, are feeble and ill-developed, the nervous system exhibits only a slight advance over the forms which it presents among the higher Annelida. In lulus (fig. 33) the single abdominal cord shows almost no traces of ganglionic swellings, owing to the great number of the small nerves given off
. The brain as an organ of mind. Brain; Thought and thinking; Brain. 94 THE NERVOUS SYSTEM OF ARTHROPODS. likely to be associated with greater brain development and with higher or more complex brain functions. Among the low^er Myriapods, such as lulus and Geophi- lus, in which the limbs, though very numerous, are feeble and ill-developed, the nervous system exhibits only a slight advance over the forms which it presents among the higher Annelida. In lulus (fig. 33) the single abdominal cord shows almost no traces of ganglionic swellings, owing to the great number of the small nerves given off on each side, along its entire length, which are distributed to the hundreds of small segments entering into the composition of the Fig. 33.—Anterior part of the Nervous System of lulus (Owen), a, a. Cerebral ganglia; c, c, optic nerves ; d, d, antennal nerves; h, nerves of the palpless mandibles ; g, oesophageal cords; e, /, stomato-gastric nerves; li, motor nerves to the maxillae, proceeding from the part which corresponds with the sub-oesophageal ganglia, here fused with i, z, the ventral cord. The brain [a, a), elongated transversely, is divided by a slight median furrow, and is continuous wdth the short and thick optic nerves (c, c). Two separate nerves are received from the antennse on each side (d, d), below^. 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 Bastian, H. Charlton. N. Y. , Appleton
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbrain, booksubjecttho
