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"Gelatinous substance of the disc of Aurelia, showing-a, fibrous trabeculae, and b, wandering endoderm cells, with amaebold movements." — Encyclopedia Britannica, 1893

Aurelia

"Gelatinous substance of the disc of Aurelia, showing-a, fibrous trabeculae, and b, wandering endoderm…

Section of medullary substance of an inguinal gland of an ox. Labels: a, glandular substance or pulp forming rounded cords joining in a continuous net ( dark in the figure): c, trabeculae; the space, b, between these and the glandular substance is the lymph sinus, washed clear or corpuscles and traversed by filaments of retiform connective tissue.

Medullary Substance of an Inguinal Gland

Section of medullary substance of an inguinal gland of an ox. Labels: a, glandular substance or pulp…