. Zoology : for students and general readers . Zoology. PonTUQUME MAN-OF-WAR. The colony or hydrosome of the Portuguese man-of-war consists of long locomotive tentacles, which, when the ani- mal is driven by its broad sail or float before the wind, stretch out in large individuals from thirty to fifty feet. These large Hydra-like zooids are arranged in small groups, arising from a hollow stem com- municating with the chymiferous cavity extending between the in- ner and outer wall of the float. The " feeders " are of two kinds, large and small, and are clustered in branches growing fr
. Zoology : for students and general readers . Zoology. PonTUQUME MAN-OF-WAR. The colony or hydrosome of the Portuguese man-of-war consists of long locomotive tentacles, which, when the ani- mal is driven by its broad sail or float before the wind, stretch out in large individuals from thirty to fifty feet. These large Hydra-like zooids are arranged in small groups, arising from a hollow stem com- municating with the chymiferous cavity extending between the in- ner and outer wall of the float. The " feeders " are of two kinds, large and small, and are clustered in branches growing from a com- mon hollow stem, also communi- cating with the chymiferous or body-cavity. L. Agassiz, whose description of this animal we are condensing, states that he has seen these feeders "gorged with food almost to bursting," but has never seen undigested food in any of the other organs. The medusa-buds (gonophores) arise from a third set of very small Hydras, but form very large clus- ters suspended between the clus- ters of feeders. These reproduc- tive zooids resemble the locomo- tive zooids, but, like the feeders, have no tentacles. The medusa- buds, which are male or female, arise singly, either from the base of the reproductive zooids or from the stems which unite the latter. These buds, as in Tuhu- laria, wither without dropping from their parent stock. It appears, then, that the floating hydrosome of a Siphon- ophore is like that of the fixed Hydractinia or Coryne, with the addition of locomotive zooids and a float, as seen in Physalia, Velella, or the swimming-bells of mau-of-war. 'hysoi -Ifts. 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 Packard, A. S. (Alpheus Spring), 1839-1905. New York : Henry Holt
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectzoology, bookyear1879
