| ↑ 1 blocks not present in 1859 1860 1861 1872; present in 1866 1869 |
| Land-shells and fresh-water crustaceans are born with
their proper forms,
whilst the marine members of these
two great classes pass through considerable and often great developmental
changes.
|
|
| → The larvæ of insects, whether 1859 1860 1861 |
| With almost all insects, the larvæ, whether 1866 |
| The larvæ of most insects pass through a worm-like stage, whether they are active and 1869 1872 |
|
| → the most diverse and active 1859 1860 1861 |
| diversified and active 1866 |
| diversified 1869 1872 |
|
| → being fed by their parents or placed in the midst of proper nutriment, 1859 1860 1861 |
| being placed in the midst of proper nutriment or fed by their parents, 1866 |
| from being placed in the midst of proper nutriment 1869 1872 |
|
| → yet nearly all pass through a similar worm-like stage of development; 1859 1860 1861 1866 |
| or from being fed by their parents; 1869 1872 |
|
| → by Professor Huxley of the development of this insect, 1859 1860 1861 1866 |
| of the development of this insect, by Professor Huxley, 1869 1872 |
|
| → of embryos of different species within the same class, generally, 1859 1860 1861 1866 |
| the general, 1869 |
| the common, 1872 |
|
| → each other;— 1859 1860 1861 1866 |
| between the embryos or larvæ 1869 1872 |
|
| → structure of 1859 1860 1861 1866 |
| most distinct species in the same class;— 1869 1872 |
|
| → not being closely related to its conditions of existence, except when the embryo becomes at any period of life active and has 1859 1860 1861 |
| not being closely related to its conditions of existence, existence, except when the embryo becomes at any period of life active and has 1866 |
| retaining whilst within the egg or womb, structures which are of no service to it, either at that period or later in life; whilst embryos at a later period, or larvæ, which have 1869 |
| often retaining whilst within the egg or womb, structures which are of no service to it, either at that or at a later period of life; on the other hand larvæ, which have 1872 |
|
| → itself;— of the embryo apparently having sometimes a higher 1859 1860 1861 1866 |
| their own wants, are perfectly adapted to the surrounding conditions;— and lastly the fact of certain larvæ standing higher in the scale of 1869 |
| their own wants, being perfectly adapted to the surrounding conditions;— and lastly the fact of certain larvæ standing higher in the scale of 1872 |
|
| → necessarily 1859 1860 1861 1866 |
| or individual differences necessarily 1869 1872 |
|
| → head— indeed the evidence rather 1859 1860 1861 1866 |
| head, but what we have certainly 1869 1872 |
|
