The Whence and the Whither of Man: A Brief History of His Origin and Development Through Conformity to Environment; Being the Morse Lectures of 1895C. Scribner's son, 1896 - 312 pagine |
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Pagina v
... Annelids and arthro- pods : The external locomotive skeleton leads to temporary rapid advance , but fails of the goal . - Its disadvantages . - Vertebrates : The internal loco- motive skeleton leads to backbone and brain . -Reasons for ...
... Annelids and arthro- pods : The external locomotive skeleton leads to temporary rapid advance , but fails of the goal . - Its disadvantages . - Vertebrates : The internal loco- motive skeleton leads to backbone and brain . -Reasons for ...
Pagina 43
... will divide each of these quarters into an upper and lower octant . The. 3. IMMATURE EGG - SHELL FROM OVA- RY OF ECHINODERM . HATSCHEK , FROM HERTWIG . 8. CROSS - SECTION OF BODY SEGMENT OF ANNELID ,. PROTOZOA TO WORMS 43.
... will divide each of these quarters into an upper and lower octant . The. 3. IMMATURE EGG - SHELL FROM OVA- RY OF ECHINODERM . HATSCHEK , FROM HERTWIG . 8. CROSS - SECTION OF BODY SEGMENT OF ANNELID ,. PROTOZOA TO WORMS 43.
Pagina 57
... annelids and culminating in insects . The molluscan and articulate lines , though divergent , are of great importance to us as throwing a certain amount of light on vertebrate development ; and still more as showing how a certain line ...
... annelids and culminating in insects . The molluscan and articulate lines , though divergent , are of great importance to us as throwing a certain amount of light on vertebrate development ; and still more as showing how a certain line ...
Pagina 61
... annelids . Of these our common earthworm is a good example , and near them belong the leeches . But the marine annelids , of which nereis , or a clam - worm , is a good example , are more typical ... ( ANNELID ) . LANG WORMS TO VERTEBRATES 61.
... annelids . Of these our common earthworm is a good example , and near them belong the leeches . But the marine annelids , of which nereis , or a clam - worm , is a good example , are more typical ... ( ANNELID ) . LANG WORMS TO VERTEBRATES 61.
Pagina 62
... ( ANNELID ) . LANG , FROM EHLERS . Front and hind end seen from dorsal surface . fa , fp , fc , feelers ; a , eye ; k , gill ; p , parapodia ; ac , anal cirri . bands of longitudinal mus- cles . These latter have been grouped in the four ...
... ( ANNELID ) . LANG , FROM EHLERS . Front and hind end seen from dorsal surface . fa , fp , fc , feelers ; a , eye ; k , gill ; p , parapodia ; ac , anal cirri . bands of longitudinal mus- cles . These latter have been grouped in the four ...
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The Whence and the Whither of Man: A Brief History of His Origin and ... John Mason Tyler Visualizzazione completa - 1896 |
The Whence and the Whither of Man: A Brief History of His Origin and ... John Mason Tyler Visualizzazione completa - 1897 |
The Whence and the Whither of Man: A Brief History of His Origin and ... John Mason Tyler Visualizzazione completa - 1899 |
Parole e frasi comuni
advance amoeba amphibia anatomical ancestors animal kingdom annelid apes appear appetite archenteron attained become beginning better birds body brain cells cerebrum characteristics conformity to environment conscious degeneration dominant ectoderm embryo embryology entoderm experience eyes fish functions future ganglion gastrula germ-plasm give groups heredity higher animals higher forms highest human hydra important increase individual insect instinct intelligence jaws knowledge laws layer legs living locomotion lower mammals man's marsupial ment mental mind mode modified mollusks moral motives muscles muscular muscular system natural selection nephridia nerve nervous system never notochord nutriment organs oxygen parapodia perception possible primitive probably progress protoplasm protozoa purely reflex action reptiles result schematic worm segments selfish sense-organs sequence shell skeleton species spermatozoa stage structure struggle surface survive swimming theory of evolution tion tissues true truth turbellaria unselfishness variation velopment vertebral column vertebrates volvox young