A manual of zoologyWilliam Blackwood & Sons, 1878 |
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Página 26
... sometimes exist in particular genera― termed " protean " or " polymorphic " genera - that the deter- mination of the different species and varieties becomes an almost hopeless task . Besides the individual differences which ordinarily ...
... sometimes exist in particular genera― termed " protean " or " polymorphic " genera - that the deter- mination of the different species and varieties becomes an almost hopeless task . Besides the individual differences which ordinarily ...
Página 56
... sometimes spoken of as the " Stomatode " Protozoa , whilst the two former classes collec- tively constitute the " Astomata . " The following is a tabular view of the divisions of the Protozoa : - Class I. GREGARINIDE . Class II ...
... sometimes spoken of as the " Stomatode " Protozoa , whilst the two former classes collec- tively constitute the " Astomata . " The following is a tabular view of the divisions of the Protozoa : - Class I. GREGARINIDE . Class II ...
Página 58
... sometimes in a single Gregarina without apparent cause , sometimes as the result of the apposition and coalescence of two individuals - the exact nature of the process being in either case obscure . In some species conjugation is in ...
... sometimes in a single Gregarina without apparent cause , sometimes as the result of the apposition and coalescence of two individuals - the exact nature of the process being in either case obscure . In some species conjugation is in ...
Página 59
... sometimes very delicate and of considerable length , at other times more like finger - shaped processes ; and they are identical with the little processes which can be thrown out by the white corpuscles of the blood and by pus - cells ...
... sometimes very delicate and of considerable length , at other times more like finger - shaped processes ; and they are identical with the little processes which can be thrown out by the white corpuscles of the blood and by pus - cells ...
Página 76
... ( sometimes called " cellæform bodies " ) with distinct nuclei , surrounded by a zone of siliceous spicules , the whole being embedded in a common gelatinous matrix . The centre of the mass is vacuolated , sometimes to such an extent that ...
... ( sometimes called " cellæform bodies " ) with distinct nuclei , surrounded by a zone of siliceous spicules , the whole being embedded in a common gelatinous matrix . The centre of the mass is vacuolated , sometimes to such an extent that ...
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Outras edições - Ver tudo
Manual of Zoology ...: With a General Introduction on the Principles of Zoology Henry Alleyne Nicholson Pré-visualização indisponível - 2015 |
Palavras e frases frequentes
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