Proceedings of the American Philosophical Society Held at Philadelphia for Promoting Useful Knowledge, Томи 41 – 42The Society, 1902 |
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Сторінка 102
... lower part of the tube and later evacuated . Karyokinesis in these cells ( spermatogonia ) was ob- served but once , and the stages intervening between them and the spermatocytes were not discovered . The condition of the lower part of ...
... lower part of the tube and later evacuated . Karyokinesis in these cells ( spermatogonia ) was ob- served but once , and the stages intervening between them and the spermatocytes were not discovered . The condition of the lower part of ...
Сторінка 103
... lower portion of the follicles and referred by Gilson to the germ cells is probably that of follicle cells , for they are described as occupying the periphery of the tube in its median portion . 1885. Carnoy makes the following ...
... lower portion of the follicles and referred by Gilson to the germ cells is probably that of follicle cells , for they are described as occupying the periphery of the tube in its median portion . 1885. Carnoy makes the following ...
Сторінка 114
... lower. Toward the bottom of the Oreodon beds in the Bad Lands of South Dakota, there is a series of sandstone lenses known as the Metamynodon sandstones. These sandstones are faunally distinct from the surrounding clays. At the top of ...
... lower. Toward the bottom of the Oreodon beds in the Bad Lands of South Dakota, there is a series of sandstone lenses known as the Metamynodon sandstones. These sandstones are faunally distinct from the surrounding clays. At the top of ...
Сторінка 114
... lower . Toward the bottom of the Oreodon beds in the Bad Lands of South Dakota , there is a series of sandstone lenses known as the Metamynodon sandstones . These sandstones are faunally distinct from the sur- rounding clays . At the ...
... lower . Toward the bottom of the Oreodon beds in the Bad Lands of South Dakota , there is a series of sandstone lenses known as the Metamynodon sandstones . These sandstones are faunally distinct from the sur- rounding clays . At the ...
Сторінка 116
... lower series , easily distinguishable both by faunal and lithological characters . These subdivisions in the Arikaree will be referred to and fully described later . 3. The Ogalalla Formation . - This consists of a series of calcar ...
... lower series , easily distinguishable both by faunal and lithological characters . These subdivisions in the Arikaree will be referred to and fully described later . 3. The Ogalalla Formation . - This consists of a series of calcar ...
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Africa AMER AMERICAN PHILOSOPHICAL SOCIETY animals appear April Asia Australia auta autic beds belong blastopore body brachiopods Cambaroides Cambarus canals cells Central chromosomes cœlom connection contains crude oil Crustacea crystals curves Decapods deposits distillates distribution division domeykite drones eggs enteron Eocene equation evidence existence fact fauna Feb'y fertilization follicle formation forms fossils freshwater genera genus geographer geological Greater Antilles hydrocarbons islands Jan'y Jurassic land larva larvæ later Lower Cretaceous male mantle mass Mesozoic method Mexico Miocene nature Noctua North northern nuclei observed Ocean Oligocene origin parthenogenesis Pennsylvania petroleum Philadelphia PHILOS plate Pliocene polar body posterior Potamobius present probably PROC produced Prof queen region relation represented river sandstones separated shown solution South America southern species spermatocyte spermatogonia spermatozoa stage Terebratulina Tertiary theory tion Upper Cretaceous Zool