 | 1902 - عدد الصفحات: 588
...consequently of their like origin there can be no doubt. The general gill structures have, according to Kerr, "the primary function of respiration. They are also,...therefore, to suggest that the more ancient Gnathostomata possessed a series of potentially motor, potentially supporting structures projecting from their visceral... | |
 | Cambridge Philosophical Society - 1898 - عدد الصفحات: 1014
...structures inherited from a common ancestor and consequently of great antiquity in the Vertebrate stem2'*. These structures have the primary function of Respiration....the more ancient Gnathostomata possessing a series ot potentially motor, potentially supporting structures projecting from their visceral arches, it was... | |
 | Cambridge Philosophical Society - 1900 - عدد الصفحات: 450
...structures inherited from a common ancestor and consequently of great antiquity in the Vertebrate stem2't. These structures have the primary function of Respiration....suggest that the more ancient Gnathostomata possessing a ser1es of potentially motor, potentially supporting structures projecting from their visceral arches,... | |
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These structures have the primary function of Respiration. They are also however provided with an elaborate muscular apparatus comprising Elevators, Depressors, and Adductors, and larvae possessing them may be seen every now and then to give them a sharp... 