Jelly-fish, star-fish and sea-urchinsD. Appleton and Company, 1898 - 323 pagini |
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Pagina 21
... authors further supply much * See " Observations on the Nervous System of Aurelia aurita , ” Phil . Trans . , pt . ii . , 1878 . interesting information touching the structure of the sense - organs 3 STRUCTURE OF THE MEDUSE . 21.
... authors further supply much * See " Observations on the Nervous System of Aurelia aurita , ” Phil . Trans . , pt . ii . , 1878 . interesting information touching the structure of the sense - organs 3 STRUCTURE OF THE MEDUSE . 21.
Pagina 22
George John Romanes. interesting information touching the structure of the sense - organs in various species of Medusæ ; but it seems scarcely necessary to extend the present résumé of their work by entering into this division of their ...
George John Romanes. interesting information touching the structure of the sense - organs in various species of Medusæ ; but it seems scarcely necessary to extend the present résumé of their work by entering into this division of their ...
Pagina 38
... ways I have satisfied myself that the paralyzed tissues of swimming organs respond to sudden elevations of temperature . Luminous Stimulation . It is interesting to note that , 38 JELLY - FISH , STAR - FISH , AND SEA - URCHINS .
... ways I have satisfied myself that the paralyzed tissues of swimming organs respond to sudden elevations of temperature . Luminous Stimulation . It is interesting to note that , 38 JELLY - FISH , STAR - FISH , AND SEA - URCHINS .
Pagina 39
George John Romanes. Luminous Stimulation . It is interesting to note that , in the case of some of the naked - eyed Medusæ , the action of light as a stimulus is most marked and unfailing . In the case of Sarsia , for instance , a flash ...
George John Romanes. Luminous Stimulation . It is interesting to note that , in the case of some of the naked - eyed Medusæ , the action of light as a stimulus is most marked and unfailing . In the case of Sarsia , for instance , a flash ...
Pagina 44
... therefore , was simply this - Does the pro- longed delay on the part of these ganglia , in responding to light , interesting question , because if such a lengthened period of 44 JELLY - FISH , STAR - FISH , AND SEA - URCHINS .
... therefore , was simply this - Does the pro- longed delay on the part of these ganglia , in responding to light , interesting question , because if such a lengthened period of 44 JELLY - FISH , STAR - FISH , AND SEA - URCHINS .
Termeni și expresii frecvente
able ambulacral feet artificial rhythm Aurelia aurita become bell blocked brium cause ceased chloroform co-ordination continue contractile strip contractile tissue contraction contraction-waves covered-eyed Medusa crawling curare diastole direction discharge Echinoderm Echinodermata Echinus effect excising excitable tissues experiments fact feeble fibres forceps fresh water function ganglionic glycerine hour Illustrations induction shocks influence instance intervals irritability jelly-fish latter lithocyst locomotor centres manubrium marginal bodies marginal ganglia minutes movements muscle muscular mutilated naked-eyed Medusa natural rhythm nectocalyx nerve nerve-cells nerve-centre nerve-fibres nerve-ring nerve-trunks nervous network nervous system normal sea-water observed occur organ paralyzed pass pedicellariæ pedicels period of latent physiological plexus poison portion prepotent Professor pulsations radial tubes rays reflex reflex action removed response Sarsia seconds segments spasm species specimens spines spontaneity Star-fish strychnia suckers surface swimming motions swimming-bell systole tank temperature tentacles tentacular tetanus Tiaropsis indicans tion umbrella unmutilated animal wave whole