The Advancement of Science: Occasional Essays & AddressesMacmillan, 1890 - 387 |
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Strona 17
... become simpler and simpler as we recede into the past until we reach a small shapeless lump of living matter devoid of structure , so do we find actually as a matter of fact , which any one can see for himself , that every individual ...
... become simpler and simpler as we recede into the past until we reach a small shapeless lump of living matter devoid of structure , so do we find actually as a matter of fact , which any one can see for himself , that every individual ...
Strona 26
... become ridiculously small , and are evidently ceasing to be useful in the way in which those of Lacerta are useful ... becomes adapted to less varied and less complex conditions of life ; whilst Elaboration is a gradual change of 26 ...
... become ridiculously small , and are evidently ceasing to be useful in the way in which those of Lacerta are useful ... becomes adapted to less varied and less complex conditions of life ; whilst Elaboration is a gradual change of 26 ...
Strona 27
... becomes adapted to more and more varied and complex conditions of existence . In Elaboration there is a new expression of form , corresponding to new perfection of work in the animal machine . In Degeneration there is sup- pression of ...
... becomes adapted to more and more varied and complex conditions of existence . In Elaboration there is a new expression of form , corresponding to new perfection of work in the animal machine . In Degeneration there is sup- pression of ...
Strona 29
... become an elongated worm - like creature ( Fig . 8 ) , fitted only to suck in nourishment and carry eggs . LARVA BALANUS , LARVA CHTHAMALUS 2ND STAGE OF LARVA LEPAS . YOUNG CIRRIPDE PUPA FIG . 10. - Development of Cirrhipedes ( Bar ...
... become an elongated worm - like creature ( Fig . 8 ) , fitted only to suck in nourishment and carry eggs . LARVA BALANUS , LARVA CHTHAMALUS 2ND STAGE OF LARVA LEPAS . YOUNG CIRRIPDE PUPA FIG . 10. - Development of Cirrhipedes ( Bar ...
Strona 31
... become mere stumps , and the body is elongated like that of a worm . FIG . 11 . FIG . 12 . FIG . 11 .-- Acarus equi . A degenerate Spider or mite , parasitic on the skin of the horse . FIG . 12. - Degenerate Spider ( Demodex ...
... become mere stumps , and the body is elongated like that of a worm . FIG . 11 . FIG . 12 . FIG . 11 .-- Acarus equi . A degenerate Spider or mite , parasitic on the skin of the horse . FIG . 12. - Degenerate Spider ( Demodex ...
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