Mating, how do i tell if one of my land crabs are a boy or a girl ?

Question
I have two land hermit crabs and I want to know what one is a boy and what one is a girl so i can get them to mate.

Answer
Here's a link that shows what to look for on your land hermit crab,to see if it's a female.
http://hermitcrabaddiction.net/forum/index.php?topic=50.msg434#msg434

Land hermit crabs won't breed in captivity. They have to release their eggs in the ocean, and a few people have tried but were unsuccessful with it.