Jelly-fish, star-fish and sea-urchinsD. Appleton and Company, 1898 - 323 pagini |
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Pagina 11
... manubrium , like the umbrella , varies much in size and shape in different species , as a glance at any figures of these animals will show . Both the manubrium and umbrella are almost entirely composed of a thick , transparent , and non ...
... manubrium , like the umbrella , varies much in size and shape in different species , as a glance at any figures of these animals will show . Both the manubrium and umbrella are almost entirely composed of a thick , transparent , and non ...
Pagina 16
... orifice of the swimming - bell , through the central opening of which floor the manubrium passes . The structure is shown in Fig . 1 . is somewhat thickened where it is in contact with the 16 JELLY - FISH , STAR - FISH , AND SEA - URCHINS .
... orifice of the swimming - bell , through the central opening of which floor the manubrium passes . The structure is shown in Fig . 1 . is somewhat thickened where it is in contact with the 16 JELLY - FISH , STAR - FISH , AND SEA - URCHINS .
Pagina 34
... Manubrium of excising the Margin of a Nectocalyx or Umbrella . Lastly , it must now be stated , and always borne in mind , that neither in the case of naked nor covered eyed Medusæ does excision of the margin of a swimming organ produce ...
... Manubrium of excising the Margin of a Nectocalyx or Umbrella . Lastly , it must now be stated , and always borne in mind , that neither in the case of naked nor covered eyed Medusæ does excision of the margin of a swimming organ produce ...
Pagina 36
... no case does the excision of the margin of a swimming organ produce any effect upon the movements of the manubrium , نے CHAPTER III . EXPERIMENTS IN STIMULATION . Mechanical , Chemical 36 JELLY - FISH , STAR - FISH , AND SEA URCHINS .
... no case does the excision of the margin of a swimming organ produce any effect upon the movements of the manubrium , نے CHAPTER III . EXPERIMENTS IN STIMULATION . Mechanical , Chemical 36 JELLY - FISH , STAR - FISH , AND SEA URCHINS .
Pagina 51
... manubrium and lithocysts were now removed , and also a segment of the um- brella . A light straw was then forced through the gelatinous substance of the umbrella in a radial direction , and close to the gap caused by the missing segment ...
... manubrium and lithocysts were now removed , and also a segment of the um- brella . A light straw was then forced through the gelatinous substance of the umbrella in a radial direction , and close to the gap caused by the missing segment ...
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