Jelly-fish, star-fish and sea-urchinsD. Appleton and Company, 1898 - 323 pagini |
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Pagina 12
... naked and covered eyed Medusa , supports a series of con- tractile tentacles , which vary greatly in size and number in different species ( see Figs . 1 and 8 ) . The margin also supports another series of bodies which will presently be ...
... naked and covered eyed Medusa , supports a series of con- tractile tentacles , which vary greatly in size and number in different species ( see Figs . 1 and 8 ) . The margin also supports another series of bodies which will presently be ...
Pagina 12
... naked and covered eyed Medusa , supports a series of con- tractile tentacles , which vary greatly in size and number in different species ( see Figs . 1 and 8 ) . The margin also supports another series of bodies which will presently be ...
... naked and covered eyed Medusa , supports a series of con- tractile tentacles , which vary greatly in size and number in different species ( see Figs . 1 and 8 ) . The margin also supports another series of bodies which will presently be ...
Pagina 16
... naked and of the covered eyed Medusa , that a simultaneous description of the nervous system in both groups is not by these authors considered practicable . Beginning , there- fore , with the naked - eyed division , they describe the ...
... naked and of the covered eyed Medusa , that a simultaneous description of the nervous system in both groups is not by these authors considered practicable . Beginning , there- fore , with the naked - eyed division , they describe the ...
Pagina 21
... eyed Medusa ; but they do not doubt that such a system would admit of being demonstrated , and in this connection ... naked - eyed with that of the covered - eyed Medusa , with the view of indicating the points . which show the latter to ...
... eyed Medusa ; but they do not doubt that such a system would admit of being demonstrated , and in this connection ... naked - eyed with that of the covered - eyed Medusa , with the view of indicating the points . which show the latter to ...
Pagina 26
... eyed Medusa , and the much smaller though corresponding part of a naked - eyed Medusa . The former , therefore , I shall call the umbrella , and the latter the swimming - bell , or nectocalyx . In each case alike this portion of the ...
... eyed Medusa , and the much smaller though corresponding part of a naked - eyed Medusa . The former , therefore , I shall call the umbrella , and the latter the swimming - bell , or nectocalyx . In each case alike this portion of the ...
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