Excerpt from Coxal Glands of the Arachnids

Limulus has probably in many respects the most primitive arrangement of the coxal glands among the arachnids. According to patten each gland consists of four lobes (saccules), one at the base of each appendage two to five. A short duct connects each lobe with the common duct (labyrinth), which after a series of com plicated twists and turns, finally ends in a straight dilated exit tubule or end sac with its outlet just posterior to the base of the coxal joint of the fifth appendage. In the embryo, lobes are also formed on the first and sixth appendages, but degenerate and disappear in the course of development.

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