Identifier: brainasorganofmi00bast (find matches)
Title: The brain as an organ of mind
Year: 1896 (1890s)
Authors: Bastian, H. Charlton
Subjects: Brain Nervous System Physiology Brain Nervous system Psychology, Comparative
Publisher: New York : D. Appleton and Company
Contributing Library: University of Connecticut Libraries
Digitizing Sponsor: University of Connecticut Libraries

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Fio. 28.—Nervous System ofPearly Nautilus. (Gegenbauerafter Owen.) a a, Cerebral gan-glia, constituting the brain ; o o,optic ganglia in communicationwith cerebral ganglia, which arealso connected with a lower gang-lionic mass(/j b), receiving nerves(( () from the tentacles and otherpirts about the muutli, partlysensory and partly motor. Thecerebral ganglia are in additionunited to a posterior sub-ceso-phageal mass (c c), supposed torepresent a pair of pedal and apair of branchial gan^jlia. m m.Motor nervts; d d, branchialnerves and ganglia. lopods, seem to be pri Chap. IV.) THE NERVOUS SYSTEM OF MOLLUSKS. 83 of jerks, occasioned by the reaction of the respiratorycurrents upon the surrounding water —these currents
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Fig. 29.—Nervous System of the Common Cuttle-Fish (Sepia officinalis). (Owen.)1, DoTible supra-oes-phageal ganglion developed from upper commissure; %>p, cutsurfaces of the cartilaginous cranium ; 2 2, optic ganglin ; 4 4, posterior sub-oeso-ph igeal ganglia (anterior sub-cesophageal ganglia in connection with nerves of feetand tentacles, 6 6, not seen in this view) ; 7 and 8, ganglia in connection with thepharynx and mouth, connected by nerves (5 5) with the cerebral lobes ; 13 13, greatmotor nerves, of the mantle and other parts, with ((I their gnnglia; 14, e c, respiratory-nerves ; k k, small tubercles in connection with optic ganglia. being produced by the expulsive contractions of a powerfulmuscular funnel continuous with a portion of the mantle.In the Cuttle-fish one of the most striking character- 84 THE NERVOUS SYSTEM OF MOLLUSKS. istics of the principal nerve-centres is the fact of the exist-ence of a very large optic ganglion (fig. 29, 2) on eachside, in connection with

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