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With leaf- climbers, as we shall soon see, analogous cases frequently occur; but these present no difficulty, as the stem is secured by the clasping petioles. In the many other revolving and twining plants observed by me, I never but twice saw the movement reversed; once, and only for a short space, in Ipomoea jucunda; but frequently with Hibbertia dentata.
And similar transformations have without doubt taken place in the pitcher plants of America. Observers in the Cape of Good Hope have noted two plants Roridula dentata and Biblys gigantea, which are evidently following in the footsteps of the sundews, and may be expected in the fulness of years to be their equal partners in crime.
Single thin depending shoots, such as those of the Sollya Drummondii, will turn abruptly backwards and wind up on themselves. The greater number of the depending shoots, however, of one twining plant, the Hibbertia dentata, showed but little tendency to turn upwards.
As with the strawberry, so it is generally with the twining shoots of the Hibbertia dentata, which climbs laterally from bush to bush; for these shoots, if placed in a position inclined downwards, show little and sometimes no tendency to curve upwards.
P. 122: I am surprised at your saying that "during the whole Tertiary period North America was zoologically far more strongly contrasted with South America than it is now." But we know hardly anything of the latter except during the Pliocene period, and then the mastodon, horse, several great Dentata, etc. etc., were common to the North and South.
The other species which are distinctly characterized are L. pedunculata, L. viridis, L. dentata, L. heterophylla, L. pyrenaica, L. pinnata, L. coronopifolia, L. abrotonoides, L. Lawii, and L. multifida. The L. multifida is synonymous with L. Burmanii. In Spain the therapeutic properties of L. dentata are alleged to be even more marked than in the oils of any of the other species of lavender.
The nippers, found on the lower jaw alone. 13. The ligament of the neck, and its attachments. 14. The atlas. 16. The dentata. 17. The orbits of the eye. 18. The vertebræ, or bones of the neck. 19. The bones of the back. 20. The bones of the loins. 21. The sacrum. 22. The bones of the tail. 23. The haunch and pelvis. 24. The eight true ribs. 25. The false ribs, with their cartilages. 26.
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