A manual of zoologyWilliam Blackwood & Sons, 1878 - Zoology |
From inside the book
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Page 32
... zoöids . In like manner the Hydra , which produces fresh and independent Hydra by discontinuous gemmation , is not an " individual , " but a zoöid . Here the zooids are not perma- nently united to one another , and the “ individual ...
... zoöids . In like manner the Hydra , which produces fresh and independent Hydra by discontinuous gemmation , is not an " individual , " but a zoöid . Here the zooids are not perma- nently united to one another , and the “ individual ...
Page 33
... the former case the produced zooids all resembled each other , and the parent organism which gave rise to them ; in the latter case , the produced C zoöids are often utterly unlike each other and unlike the REPRODUCTION . 33.
... the former case the produced zooids all resembled each other , and the parent organism which gave rise to them ; in the latter case , the produced C zoöids are often utterly unlike each other and unlike the REPRODUCTION . 33.
Page 34
... zooids , however , are provided with sexual organs ; and though there is theoretically no limit to the size which ... zooids derive their nourishment from the materials collected by the nutritive zoöids , but only live until the ova are ...
... zooids , however , are provided with sexual organs ; and though there is theoretically no limit to the size which ... zooids derive their nourishment from the materials collected by the nutritive zoöids , but only live until the ova are ...
Page 36
Henry Alleyne Nicholson. tive zooid , and the production of this from the nutritive zoöid is a process of gemmation or ... zooids produced by continuous gemmation ; so that the zoological individual in these cases becomes an extremely com ...
Henry Alleyne Nicholson. tive zooid , and the production of this from the nutritive zoöid is a process of gemmation or ... zooids produced by continuous gemmation ; so that the zoological individual in these cases becomes an extremely com ...
Page 94
... zooids , each with a A B F G E Fig . 28. - Suctorial and Flagellate Infusoria . A , Podophrya ; B , Cercomonas truncata ; C. Monas neglecta ; D , Euglena sanguinea ; E , Codosiga pulcherrima ; F , Astasia trichophora ; G , Heteromastix ...
... zooids , each with a A B F G E Fig . 28. - Suctorial and Flagellate Infusoria . A , Podophrya ; B , Cercomonas truncata ; C. Monas neglecta ; D , Euglena sanguinea ; E , Codosiga pulcherrima ; F , Astasia trichophora ; G , Heteromastix ...
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Other editions - View all
Manual of Zoology ...: With a General Introduction on the Principles of Zoology Henry Alleyne Nicholson No preview available - 2015 |
Common terms and phrases
abdomen adult alimentary canal ambulacral amongst animal Annelides antennæ anus aperture appendages Arachnida articulated attached birds bivalve body bones Brachiopoda branchiæ branchial calcareous carapace cavity cephalothorax chitinous ciliated composed comprising consists contractile Crustacea Ctenophora developed disc distinct division dorsal embryo Eocene external extinct extremity feet females fins fishes Foraminifera fossil furnished gemmation genera genus gills head horny Huxley Hydrozoa incisors Insects integument intestine known labium larva larvæ legs limbs living locomotive males Mammals mandibles margin maxillæ membrane molars Mollusca mouth nervous system operculum organs ovum Owen pairs Paleozoic parasitic placed plates polypide polypites Polyzoa portion possess posterior present regarded reproductive Reptiles resembling respiratory Rotifera rudimentary Scolecida segments shell side Silurian single skeleton sometimes somites species spines stomach structure sub-order surface tail teeth tentacles termed thorax toes transverse tube upper usually valves ventral Vertebrates vesicle whilst wings Zoantharia zooids