. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 44 DISCOVERY REPORTS Arrangements [i] and [5] are at first sight incompatible. Further study of available pickled material should clear up this point, though it could be done best in the field where musculature can be relaxed. A study of old figures and diagrams will not help much. Haeckel's figures of larvae are not reliable. He would have us believe, for instance, that the pneumatophore arises as the basal part of the bracteal canal. Physophora is an interesting animal to study alive: it is ve
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 44 DISCOVERY REPORTS Arrangements [i] and [5] are at first sight incompatible. Further study of available pickled material should clear up this point, though it could be done best in the field where musculature can be relaxed. A study of old figures and diagrams will not help much. Haeckel's figures of larvae are not reliable. He would have us believe, for instance, that the pneumatophore arises as the basal part of the bracteal canal. Physophora is an interesting animal to study alive: it is very active and responds readily to stimuli. If the air-sac is touched when the animal is at rest all the palpons are at once thrown up. Even a larva can be recognized by the irritability and activity of the palpons. In the adult they very often poke 0 0 X X • • 0 0 X X o O X o * o oc*>\+' XX ** cP,+ • 00000 X X X X X [I] [2] [3] W H Text-fig. 10. Diagrammatic representation of the possible steps in derivation of the 'Physophora' arrangement of stem appendages [5] from that of Agalma [1] or vice versa, x = gastrozooid; O = palpon; # = Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Institute of Oceanographic Sciences (Great Britain); National Institute of Oceanography of Great Britain; Great Britain. Colonial Office. Discovery Committee. London ; New York : Cambridge University Press
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