A manual of zoologyWilliam Blackwood & Sons, 1878 - Zoology |
From inside the book
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Page 24
... genera , and genera into 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 ...
... genera , and genera into 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 ...
Page 26
... 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 occur in all species , other ...
... 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 occur in all species , other ...
Page 28
... genera which agree in their gencral characters . According to Agassiz , they are divisions founded upon peculiarities of " form as determined by structure . " Orders are groups of families related to one another by structural characters ...
... genera which agree in their gencral characters . According to Agassiz , they are divisions founded upon peculiarities of " form as determined by structure . " Orders are groups of families related to one another by structural characters ...
Page 29
... genera , such as the Foxes ( Vulpes ) . The family Canidae , further , is one of a number of families , such as the Cats ( Felida ) , the Bears ( Ursida ) , the Hyænas ( Hyænida ) , & c . , which collectively con- stitute the “ order ...
... genera , such as the Foxes ( Vulpes ) . The family Canidae , further , is one of a number of families , such as the Cats ( Felida ) , the Bears ( Ursida ) , the Hyænas ( Hyænida ) , & c . , which collectively con- stitute the “ order ...
Page 46
... genera- tions , can produce a breed in which the variation will be per- manent , the divergence from the parent - type being usually intensified by the process of inter - breeding . The races thus artificially produced by men are often ...
... genera- tions , can produce a breed in which the variation will be per- manent , the divergence from the parent - type being usually intensified by the process of inter - breeding . The races thus artificially produced by men are often ...
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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