| → equally modified, in accordance with the paramount importance of the relation of organism to organism. 1859 1860 1861 |
| equally modified, all the forms of life would have been more equally modified, in accordance with the paramount importance of the relation of organism to organism. 1866 |
| uniformly, and from the species having entered in a body their mutual relations would not have been much disturbed, and consequently they would have been modified either not at all or in a more equal manner. 1869 |
| uniformly, and from the species having entered in a body their mutual relations would not have been much disturbed, and consequently they would either have not been modified, or all the species in a more equable manner. 1872 |
|
| → modified since their arrival, could 1859 1860 1861 1866 |
| subsequently modified, 1869 1872 |
|
| → here give a single instance of one of the cases of difficulty. 1859 1860 1861 1866 |
| specify one such difficult case. 1869 |
| specify one difficult case. 1872 |
|
| → elsewhere. 1859 1860 1861 1866 |
| elsewhere,— striking instances of which have been given by Dr. A. A. Gould in relation to the Pacific. 1869 1872 |
|
| → be, on my view, 1859 1860 1861 1866 |
| be, according to our view, 1869 |
| be 1872 |
|
| → occasionally crawl on and 1859 1860 1861 1866 |
| sometimes 1869 1872 |
|
| → of these shells was 1859 1860 1861 1866 |
| shell, 1869 1872 |
|
| → it had 1859 1860 1861 1866 |
| having been thus treated and 1869 1872 |
|
| ↑ 6 blocks not present in 1859 1860 1861; present in 1866 1869 1872 |
| During this length of time it
might have been carried by a marine current,
running at an average rate,
to a distance of 660 geographical miles.
As this Helix has a thick calcareous operculum, I removed it, and when it had formed a new membranous one, I again immersed it for fourteen days in sea-water, and it
recovered and crawled away.
Baron Aucapitaine has recently
tried similar experiments:
he placed 100 land-shells, belonging to ten species, in a box pierced with holes, and immersed it for a fortnight in the sea.
Out of the hundred shells, twenty-seven recovered.
The presence of an operculum seems to have been of importance, as out of twelve specimens of Cyclostoma elegans, which is thus furnished, eleven revived.
It is remarkable, seeing how well Helix pomatia
with me resisted the
salt-water, that not one out
of fifty-four specimens belonging to four species
of Helix tried by Aucapitaine, recovered.
|
|
