The mechanistic conception of life : biological essays (1912)
Loeb, Jacques, 1859-1924 · Chicago, Ill. : University of Chicago Press · leaf 117
Fig. 36 Fig. 37 … Fig. 38 Figs. 36, 37, and 38.—From nature. The origin of the pattern on the yolksac of a fish embryo {Fundulus heteroclitus). Fig. 36 is a drawing of the blood-vessels at the surface of the yolk sac at an early stage of development. The blackpigment cells show no definite orientation in regard to…
