Here is the picture of the Skate egg cases I was telling you about. They are the egg cases of the clearnose skate (sometimes called a mermaid's purse or devil's purse). It is made of the material which is similar to that of finger-nails. In the sea, these cases will hold the embryos of the skate for several months and then split open to release the fully formed baby skates. From "Florida's Fabulous Seashells And Other Seashore Life" - Williams/Charmichael
