A Contribution to the History of the Germlayers in Clepsine |
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A Contribution to the History of the Germlayers in Clepsine (1887) Charles Otis Whitman No preview available - 2009 |
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Anneliden annelids appear arise Balfour bands Bergh bilateral symmetry bildet blastodisc blastomeres blastopore Blatt Branchiobdella Bütschli cephalic lobe cleavage cleavage-planes Clepsinen complanata concrescence definitive epidermis derived Diag dorsal ducts egg of Clepsine eight-cell stage embryo embryology entoderm cells entoplasts Entwicklungsgeschichte epidermal layer epidermis epithelium fœtal formation four macromeres Fourn free nuclei ganglia Gastrula germ-bands germ-layers Gnathobdellidę Hatschek hind end Hirudinea Hirudineen Hoffmann homologues Keimstreifen Kleinenberg Kowalevsky larvę larval nephridia lateral Leuckart Lumbricus mesenteron mesoblasts mesoderm Mesomeren mesomeres metameric Metschnikoff mode of origin Nephelis nephridia nephridial rows nephroblasts nerve-chain nerve-cord neural groove neuro-nephric stratum neuro-nephroblast Nusbaum observations organs parasita permanent nephridia Polygordius portion position posterior macromere primary protoplasm Rathke regarded relations represented Rhynchelmis rows of cells Salensky seen segment shown in Fig somit teloblasts Theil thickening three entoblasts three macromeres transverse section Trochosphere trunk-bud Vejdovsky ventral side vertebrates Whitman yolk Zellen Zool zwei