If we look underneath the animal, and of course this is a male, we can see he has a boxing glove here — that's the common term that's often associated with it, is a boxing glove — or sometimes called a clasper. And the clasper is what he uses to attach to the female. Alright, here we have the chelicerae, which are used in feeding. They actually take the small pieces of food and stuff them into the mouth area here. They have no jaws, so they actually bring animals into the center part here where all these spines are and they actually bring worms and clams in there and crush them and then shove them into their mouth which again has no jaws so they have to crush them here on the outside. If we look at the other legs, the walking legs, you can see they're all chelicerae, they're all forked, and there are four of them here. And then they have one pusher leg. And The pusher leg is very interesting. Look how he pushes that thing. these things acutally open up like that so when he's on mud they spread out like your hand and then as they sink into the mud and they want them to move they close them up and pull them out. So it does this kind of motion: pulls it out sinks it down, pulls it out, sinks it down. And that's how they move through mud. so that's a very interesting adaptation to survival, and the last leg is modified that way. If you look back here, they have an operculum which covers the gills, right here, and then the gills of course are underneath here and you can see the pages of the books and they have actually six sets of these gills and that's how they breathe.