Jelly-fish, star-fish and sea-urchinsD. Appleton and Company, 1898 - 323 pagini |
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Pagina 12
... round the margin ( see Figs . 1 and 22 ) . In the " covered - eyed " group , on the other hand , the tubes are strongly branched ( see Fig . 8 ) , although they likewise all eventually terminate in a single circular tube . This circular ...
... round the margin ( see Figs . 1 and 22 ) . In the " covered - eyed " group , on the other hand , the tubes are strongly branched ( see Fig . 8 ) , although they likewise all eventually terminate in a single circular tube . This circular ...
Pagina 12
... round the margin ( see Figs . 1 and 22 ) . In the " covered - eyed " group , on the other hand , the tubes are strongly branched ( see Fig . 8 ) , although they likewise all eventually terminate in a single circular tube . This circular ...
... round the margin ( see Figs . 1 and 22 ) . In the " covered - eyed " group , on the other hand , the tubes are strongly branched ( see Fig . 8 ) , although they likewise all eventually terminate in a single circular tube . This circular ...
Pagina 14
... forming a continuous circle all round the margin of the umbrella , following the course of the radial or nutrient tubes throughout their entire length , and proceeding also to the ten- 14 JELLY - FISH , STAR - FISH , AND SEA - URCHINS .
... forming a continuous circle all round the margin of the umbrella , following the course of the radial or nutrient tubes throughout their entire length , and proceeding also to the ten- 14 JELLY - FISH , STAR - FISH , AND SEA - URCHINS .
Pagina 31
... round the margin of a swimming organ , or situated only , or chiefly , in the so - called marginal bodies . To take the case of the naked- eyed Medusæ first , it is evident that in most of the genera , in consequence of the ...
... round the margin of a swimming organ , or situated only , or chiefly , in the so - called marginal bodies . To take the case of the naked- eyed Medusæ first , it is evident that in most of the genera , in consequence of the ...
Pagina 37
... round and round the vessel in which it is contained , just as a frog , with its cerebral hemi- spheres removed , may be made to hop along the table in response to a succession of stimulations . * * In the case of the covered - eyed ...
... round and round the vessel in which it is contained , just as a frog , with its cerebral hemi- spheres removed , may be made to hop along the table in response to a succession of stimulations . * * In the case of the covered - eyed ...
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