Appendages of 1st pair have two segments, as in Pedipalpi, but are furnished with poison gland, and are retroverts.
"Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 3" by Various
Moulting is effected in exactly the same way in scorpions, Pedipalpi, and normally in spiders.
"Encyclopaedia Britannica, 11th Edition, Volume 15, Slice 7" by Various
The pedipalpi carry a blade on their basal joint.
"The Works of Francis Maitland Balfour, Volume 1" by Francis Maitland Balfour