Called pedipalps, these modified legs have no direct connection to a sperm - producing organ. (sciencenews.org)
They have two smaller pedipalps -LCB- appendages near the mouth -RCB- and two jaws with fangs right next to the mouth. (inspirationlaboratories.com)
The arachnids look like big, hairy spiders with an extra pair of legs — which are really pedipalps, leg - like structures ending in an adhesive sucker, and used like arms for grasping, holding, and climbing. (sciencedaily.com)