Title:
'Discovery' reports
image: of 543
CONTENTS
Introduction...........page 303
Acknowledgements...........303
Material and Methods..........303
Non-technical Description of the Portuguese Man-of-War . . 306
Appearance and Habits..........307
Association with Nomeus.........309
Rolling or somersaulting behaviour........309
Floatation: Pneumatocyst or air-sac.......310
Motion relative to wind and water........315
Stinging power and toxicology........322
Nematocysts...........324
Morphology............326
Historical............326
Polymorphism...........328
Pattern of budding in the cormidia.......328
Early larvae............342
Structure and development of the gonodendra.....346
Jelly-polyps ............351
Nectophores............352
Palpons.............353
Ampullae............355
Gonophores............356
Origin of 'Physalia' and the Siphonophora: the paedophore
hypothesis...........358
Distribution........... . 363
Summary.............365
References............366
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