The American Naturalist, Том 9Essex Institute, 1875 |
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Загальні терміни та фрази
abdomen abundant Acad adult Agassiz AMER animals Annelides antennæ appear appendages arise ascidians Balanoglossus becomes birds blastoderm body bones Brachiopods budding Cave Cedar City cells ciliated color Crustacea diameter digestive cavity Echinoderms ectoderm eggs embryo ergot F. W. PUTNAM fact feet figure fishes fossil gastrula genera genus Geological germ germ-layer gland grains Gray growth hatching head inches Infusoria insects intestine Kowalevsky large number larva larvæ layer length less limestone lower mass maxillæ membrane Metschnikoff Microscopical mode mollusks Morula mound Mountains mouth natural NATURALIST Nauplius nearly nucleus observed organs outer pairs pass plants planula polypide Polyzoa portion present primitive probably Proc Prof region represents resembles rocks Rocky seeds seen shell side Siebold skull slender species specimens spores stage starch suckers surface swimming tail teeth tentacles tion Torr tube upper vertebrates Watson worms yolk young
Популярні уривки
Сторінка 482 - The thing that hath been, it is that which shall be; and that which is done is that which shall be done: and there is no new thing under the sun. Is there any thing whereof it may be said, See, this is new? it hath been already of old time, which was before us.
Сторінка 523 - No connection can be traced between the numbers of bacteria, spores &c , present in the air, and the occurrence of diarrhoea, dysentery, cholera, ague, or dengue ; nor between the presence or abundance of any special form or forms of cells, and the prevalence of any of these diseases.
Сторінка 577 - SECTION A. MEMBERS OF THE AMERICAN ASSOCIATION FOR THE ADVANCEMENT OF SCIENCE : I THANK you heartily for the honor you have done me in calling me to preside over this section. The first of the subjects named as belonging to section A, is mathematics. In the few words I shall say, I wish to ask for that branch the real primacy which has thus in form been given to it. I plead for more study of mathematics by American men of science. I do not speak of its place in education. Whatever interest we may...
Сторінка 72 - THOU, of all creation blest, Sweet insect ! that delight'st to rest Upon the wild wood's leafy tops, To drink the dew that morning drops, And chirp thy song with such a glee...
Сторінка 13 - And as for their appearances, they four had one likeness, as if a wheel had been in the midst of a wheel.
Сторінка 628 - ... probably in diving. The last three or four caudal vertebrae are firmly coossified, forming a flat terminal mass, analogous to, but quite unlike, the "ploughshare" bone of modern birds. The anterior two at least of these caudals have expanded transverse processes. The pelvic bones, although avian in type, are peculiar, and present some well marked reptilian features.
Сторінка 447 - to assume the horse-shoe-shaped form of Pectinatella and other high Polyzoa. The mouth at this stage begins to turn towards the dorsal valve (ventral of authors), and as the central lobes of the lophophore begin to develop, the lateral arms are deflected as in F. In these stages...
Сторінка 439 - Peninsula. It will thus be seen that this is one of the most important additions to our knowledge of the prehistoric condition of these people. So far as the specimens differed from those in use in more modern times they resembled more nearly the implements in use among the Eskimo of the mainland. The remains are all those of true aboriginal Aleuts. The Kaniagmut Eskimo, inhabiting the peninsula of Aliaska,.
Сторінка 474 - Of the remaining bones pertaining to the two skulls in question, I specially noticed that many were wanting, and that those present were heaped en masse and not in the usual manner of burial, seeming to imply that they were interred subsequently to being denuded of the flesh and the other soft parts of the body.
Сторінка 545 - Such general truths deeply impress us at least with the conclusion that we are tracing, not a fortuitous succession, but the action of power working by law. I have thus far said nothing of the bearing of the prevalent ideas of descent with modification, on this wonderful procession of life. None of these of course can be expected to take us back to the origin of living beings ; but they also fail to explain why so vast numbers of highly organized species struggle into existence simultaneously in...