A manual of zoologyWilliam Blackwood & Sons, 1878 - Zoology |
From inside the book
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Page ix
... species - Impossibility of a linear classifica- tion - Reproduction - Sexual reproduction — Non - sexual repro- duction — Gemmation and fission - Reproduction by internal gemmation - Alternation of generations - Parthenogenesis - De ...
... species - Impossibility of a linear classifica- tion - Reproduction - Sexual reproduction — Non - sexual repro- duction — Gemmation and fission - Reproduction by internal gemmation - Alternation of generations - Parthenogenesis - De ...
Page 19
... species or kind of animal was constructed upon a plan peculiar to itself and not shared by any other . This , how- ever , is far from being the case ; and it is now universally recognised that all the varied species of animals - however ...
... species or kind of animal was constructed upon a plan peculiar to itself and not shared by any other . This , how- ever , is far from being the case ; and it is now universally recognised that all the varied species of animals - however ...
Page 22
... species is protected from some enemy by its outward similarity to the form which it mimics . Finally , there are numerous cases in which animals resemble certain natural objects , and thus greatly diminish their chances of being ...
... species is protected from some enemy by its outward similarity to the form which it mimics . Finally , there are numerous cases in which animals resemble certain natural objects , and thus greatly diminish their chances of being ...
Page 24
... species . We shall ex- amine these successively , commencing with the consideration of a species , since this is the zoological unit of which the larger divisions are made up . Species . No term is more difficult to define than " species ...
... species . We shall ex- amine these successively , commencing with the consideration of a species , since this is the zoological unit of which the larger divisions are made up . Species . No term is more difficult to define than " species ...
Page 25
... species as " an assemblage of individuals , more or less resembling one another , which are descended , or may be regarded as being descended , from a single primitive pair by an uninterrupted succession of families . " Müller defines ...
... species as " an assemblage of individuals , more or less resembling one another , which are descended , or may be regarded as being descended , from a single primitive pair by an uninterrupted succession of families . " Müller defines ...
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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