A similar pair of coxal glands, lobate instead of ovoid in shape, was described by Lankester in Mygale, and it was also shown by him that the structures in Limulus called " brick-red glands " by Packard have the same structure and position as the coxal glands of Scorpio and Mygale.
In Mygale (figs.
Their movement in an upward or downward direction in Limulus and Mygale must exert a pumping action on the blood contained in the dorsal arteries and the ventral veins respectively.
Idem, " On the Skeletotrophic Tissues of Limulus, Scorpio and Mygale," Quart.
Lankester, " Coxal Glands of Limulus, Scorpio and Mygale," Quart.