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The Morphology of the Isopod Head.—Part I. The Head of. Ligia oceaniaa.

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Summary.

  • 1The external and internal features of the head of Ligia oceanica are described, and a terminology proposed for them and for similar structures in all terrestrial Isopods.
  • 2The 1st thoracic somite is shown to be distinctly demarcated from the head in this genus.
  • 3The “maxillosternal” framework and the endophragmal skeleton is described and its morphology discussed.
  • 4The mechanism and structure of the appendages of the head is described and compared with that of other Isopods.
  • 5The musculature of the head is described and its bearing on the form of the head and mechanism of the appendages is discussed.
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