Jelly-fish, star-fish and sea-urchinsD. Appleton and Company, 1898 - 323 pagini |
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Pagina 3
... or steaming away far from shore to dredge for other material , or , again , carrying on observations in the cool sea - water tanks and bell - jars of a neat little wooden workshop thrown open to the sea- breezes , INTRODUCTION . 3.
... or steaming away far from shore to dredge for other material , or , again , carrying on observations in the cool sea - water tanks and bell - jars of a neat little wooden workshop thrown open to the sea- breezes , INTRODUCTION . 3.
Pagina 4
... or steaming away far from shore to dredge for other material , or , again , carrying on observations in the cool sea - water tanks and bell - jars of a neat little wooden workshop thrown open to the sea- breezes , INTRODUCTION . 3.
... or steaming away far from shore to dredge for other material , or , again , carrying on observations in the cool sea - water tanks and bell - jars of a neat little wooden workshop thrown open to the sea- breezes , INTRODUCTION . 3.
Pagina 242
... tank of the lily - house of the Royal Botanical Society , Regent's Park , was swarming with a small and active ... tank , no one has yet suc- ceeded in tracing its life - history . Nor is it known . from what source the tank first became ...
... tank of the lily - house of the Royal Botanical Society , Regent's Park , was swarming with a small and active ... tank , no one has yet suc- ceeded in tracing its life - history . Nor is it known . from what source the tank first became ...
Pagina 245
... tank is shaded , all the Medusa congregate at the end which remains unshaded . Moreover , during the daytime they swim about at the surface of the water ; but when the sun goes down they subside , and can no longer be seen . In all ...
... tank is shaded , all the Medusa congregate at the end which remains unshaded . Moreover , during the daytime they swim about at the surface of the water ; but when the sun goes down they subside , and can no longer be seen . In all ...
Pagina 274
... tank ( a ) ; then , by a successive and similar action of the ambulacral feet further back in the series , the whole ray is twisted round ( b ) , so that the ambulacral surface of the end is applied flat against the floor of the tank ...
... tank ( a ) ; then , by a successive and similar action of the ambulacral feet further back in the series , the whole ray is twisted round ( b ) , so that the ambulacral surface of the end is applied flat against the floor of the tank ...
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