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In consequence of the growth-movements which cause this severance, a groove-shaped depression is formed at the surface of the vesicle, the limiting furrow, which surrounds the vesicle in the shape of a pit, and a circular mound or dam (Figure 1.139 ks) is formed at the outside of this pit by the elevation of the contiguous parts of the germinal vesicle.
The Evolution of Man — Volume 1 Ernst Heinrich Philipp August Haeckel 1876
Before the invention of percussion caps, guns were provided with a little groove-shaped trough by the side of the powder chamber.
The Big Brother A Story of Indian War George Cary Eggleston 1875