 | 1872 - 830 דפים
...which possesses a mouth neither distinctly mandibulate nor distinctly suctorial, but constituted as a peculiar type, capable of modification in either...direction by gradual changes, without loss of utility. The complete metamorphosis of the Lepidoptera, Coleoptera and Diptera, will then be the result of adaptive... | |
 | Sir Norman Lockyer - 1873 - 742 דפים
...In discussing this suKject it is necessary also to take into consideration the nature and origin of wings. Whence are they derived ? why are there normally...questions are not less difficult than interesting. It has been suggested, and I think with justice, that the wings of insects originally served for aquatic... | |
 | Sir Norman Lockyer - 1872 - 540 דפים
...certain larvae which occur both in the mandibulate and suctorial series of insects, and which possesses a mouth neither distinctly mandibulate nor distinctly...direction by gradual changes without loss of utility. If these views are correct, the genus Campodea must be regarded as a form of remarkable interest, since... | |
 | Sir Norman Lockyer - 1872 - 540 דפים
...certain larvae which occur both in the mandibulate and suctorial series of insects, and which possesses a mouth neither distinctly mandibulate nor distinctly...direction by gradual changes without loss of utility. If these views are correct, the genus Campodea must be regarded as a form of remarkable interest, since... | |
 | 1872 - 830 דפים
...certain larvze, which occurs both in the mandibulate and suctorial series of insects, and which possesses a mouth neither distinctly mandibulate nor distinctly...direction by gradual changes, without loss of utility. The complete metamorphosis of the Lepidoptera, Coleoptera, and Diptera, will then be the result of... | |
 | 1872 - 824 דפים
...which possesses a mouth neither distinctly mandibulate nor distinctly suctorial, but constituted as a peculiar type, capable of modification in either...direction by gradual changes, without loss of utility. The complete metamorphosis of the Lepidoptera, Coleoptera and Diptera, will then be the result of adaptive... | |
 | Linnean Society of London - 1873 - 906 דפים
...and possessing a mouth neither distinctly mandibulate nor distinctly suctorial, but constituted ou a peculiar type capable of modification in either...nature and origin of the wings. Whence are they derived ? way are there normally two pairs ? and why arc they attached to tie meso- and metathorax ? These... | |
 | Sir Norman Lockyer - 1873 - 584 דפים
...In discussing this subject it is necessary also to take into consideration the nature and origin of wings. Whence are they derived ? why are there normally...questions are not less difficult than interesting. It has been suggested, and I think with justice, that the wings of insects originally served for aquatic... | |
 | Sir John Lubbock - 1873 - 482 דפים
...suctorial series of insects, in Lepidoptera, Hymenoptera, Orthoptera, and Coleoptera, and which possesses a mouth neither distinctly mandibulate nor distinctly...direction by gradual changes without loss of utility. These considerations seem to me strongly to support M. Brauer's conclusion, that in the very interesting... | |
 | Sir John Lubbock - 1873 - 452 דפים
...suctorial series of insects, in Lepidoptera, Hymenoptera, Orthoptera, and Coleoptera, and which possesses a mouth neither distinctly mandibulate nor distinctly...direction by gradual changes without loss of utility. These considerations seem to me strongly to support M. Brauer's conclusion, that in the very interesting... | |
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... possessing a mouth neither distinctly mandibulate nor distinctly suctorial, but constituted on a peculiar type capable of modification in either direction by gradual changes without loss of utility. 
