...Blastoderm: the germinal membrane from which the organsof the embryo are formed... 
John. B. Smith 「Explanation of Terms Used in Entomology」
...He showed that the two layers of cells from whichthe body of this zoophyte is developed correspond, both morphologically andphysiologically, to the two original germinal layers of the vertebrate...
Ernst Haeckel 「The Evolution of Man」
...The many new points of view and fresh ideas suggested by my gastræa theory andHertwig’s cœlom theory led to the publication of a number of writings onthe theory of germinal layers...
Ernst Haeckel 「The Evolution of Man」
...Its tread is composed of several cells, and isnow commonly called the germinal disc...
Ernst Haeckel 「The Evolution of Man」
...The two primary germinal layers were first distinguished by Pander in 1817 inthe incubated chick...
Ernst Haeckel 「The Evolution of Man」
...Twenty years later (1849) Huxley pointed out that in manyof the lower zoophytes, especially the medusæ, the whole body consiststhroughout life of these two primary germinal layers...
Ernst Haeckel 「The Evolution of Man」
...30–36) indeveloping the two primary germinal layers from a single layer of cells...
Ernst Haeckel 「The Evolution of Man」
...But these aresecondary additions, and the inner germinal layer is a simple stratum of cells...
Ernst Haeckel 「The Evolution of Man」
...This takes no direct part in the building of the germinal layers,and completely fills the primitive gut-cavity of the gastrula, even protrudingat the mouth-opening...
Ernst Haeckel 「The Evolution of Man」
...The circular border of the germinal disk which connects the roofand floor of the segmentation-cavity corresponds to the border-zone at theequator of the amphibian ovum...
Ernst Haeckel 「The Evolution of Man」
...At this spotwe have the most brisk cleavage of the cells; hence the cells are more numerousand smaller here than in the fore-half of the germinal disk...
Ernst Haeckel 「The Evolution of Man」
...Until we admit thisthesis we cannot understand the formation of the germinal layers in the mammal,and therefore in man...
Ernst Haeckel 「The Evolution of Man」
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