Jelly-fish, star-fish and sea-urchinsD. Appleton and Company, 1898 - 323 pagini |
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Pagina 10
... Ray Lankester's article in the " Encyclopædia Britannica " on Hydrozoa , " together with Professor Haeckel's Report on the Medusa of the Challenger Expedition . 16 Fig . 1.- Sarsia ( natural size ) . extends to a tolerably close ...
... Ray Lankester's article in the " Encyclopædia Britannica " on Hydrozoa , " together with Professor Haeckel's Report on the Medusa of the Challenger Expedition . 16 Fig . 1.- Sarsia ( natural size ) . extends to a tolerably close ...
Pagina 42
... rays by which the organ is affected are the heat - rays lying beyond the range of the visible spectrum . Accordingly I brought a heated iron , just ceasing to be red , close against the large bell - jar which contained the numerous ...
... rays by which the organ is affected are the heat - rays lying beyond the range of the visible spectrum . Accordingly I brought a heated iron , just ceasing to be red , close against the large bell - jar which contained the numerous ...
Pagina 43
George John Romanes. rays is present , and that this faculty is lodged exclusively in the marginal bodies ; while from observations conducted on the covered - eyed Medusæ , I have come to the same conclusion respecting them . But ...
George John Romanes. rays is present , and that this faculty is lodged exclusively in the marginal bodies ; while from observations conducted on the covered - eyed Medusæ , I have come to the same conclusion respecting them . But ...
Pagina 47
... rays of the spectrum when these are employed separately ; but that neither the non - luminous rays beyond the red , nor those beyond the violet , appear to exert the smallest degree of stimulating influence . Electrical Stimulation ...
... rays of the spectrum when these are employed separately ; but that neither the non - luminous rays beyond the red , nor those beyond the violet , appear to exert the smallest degree of stimulating influence . Electrical Stimulation ...
Pagina 242
... Ray Lankester , being the genus Aglauropsis , which occurs on the coast of Brazil . The Medusa was called Limnocodium ( íμvn , a pond , and κwdwv , a bell ) sorbii by Professors All man and Lankester . I am indebted to the kindness of ...
... Ray Lankester , being the genus Aglauropsis , which occurs on the coast of Brazil . The Medusa was called Limnocodium ( íμvn , a pond , and κwdwv , a bell ) sorbii by Professors All man and Lankester . I am indebted to the kindness of ...
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