Sentence Examples


  • The rhopalia are lodged in the notches be tween the marginal lobes of the umbrella, and each rhopalium is covered over by a little protecting flap or lappet.
  • In Charybdaea there are no less than six ocelli on each of the four rhopalia (fig.
  • Highly developed eyes, with ectodermal pigment and lens, are found also on the rhopalia of Paraphyllina (Maas [81).
  • - Medusae more or less cubical in form, with four perradial rhopalia alternating with four interradial tentacles or groups of tentacles; oral arms short; stomach a wide cavity bearing four interradial groups of phacellae and giving off four broad perradial pouches completely separated from each other by four interradial septa (i.e.
  • - Medusae of deep pyramidal form, often sessile, attached by a stalk developed from the centre of the exumbral surface; rhopalia absent or represented by colletocystophores.

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