Tail-less whip scorpions or amblypigids are very efficient predators. They remain hidden under leaves, bark and other debris for most of the day. They come out at night to feed. Their chelicerae are modified into strong, spine-armored grasping organs that the hapless arthropods would find nearly inescapable. Their front pair of legs, in contrast, are long and slender, obviously modified

for sensory functions. Lacking any type of tail appendage, these formidable creatures are not frequently encountered. The females carry their eggs in a sac attached to the undersurface of the abdomen by a few silken threads.

The abdomen has what "looks like" an egg sac. This is not an egg sac but probably an extrusion that is made by gasses from the body and excretion of uric acids and other metabolites.

Such an unbelievably rare item, this whip scorpion. Look carefully because it is the only one you will ever see for sale.

Here is a scanned image with a ruler next to it. You can click on the above images it see a larger picture.