Sand Dollar
Aug. 24th, 2008 10:39 am

The Legend of the Sand Dollar
There’s a lovely little legend
that I would like to tell,
of the birth and death of Jesus,
found in this lowly shell.
If you examine closely,
you’ll see that you find here,
four nail holes and a fifth one,
made by a Roman’s spear.
On one side the Easter lily,
its center is the star,
that appeared unto the shepherds
and led them from afar.
The Christmas Poinsettia
etched on the other side,
reminds us of His birthday,
our happy Christmastide.
Now break the center open,
and here you will release,
the five white doves awaiting,
to spread Good Will and Peace.
This simple little symbol,
Christ left for you and me,
to help us spread His Gospel,
through all Eternity.
Author Unknown
If you've strolled along a beach, you've probably found a sand dollar. But what is a sand dollar? Children have been known to say that sand dollars are pressed sand that has been dried or even the money of mermaids washed-up from the deep. In reality, the fragile disk is the skeleton or "test" of a marine animal. By the time the test washes up on the beach it is missing its velvety covering of minute spines and appears somewhat bleached from the sun. It is hard to believe it was once alive.
Sand dollars are from the class of marine animals known as Echinoids, spiny skinned creatures. Their relations include the sea lily, the sea cucumber, the star fish and the sea urchin. When alive, the local species, Echinarachnius parma is outfitted in a maroon-colored suit of moveable spines that encompass the entire shell. Like its close relative the sea urchin, the sand dollar has five sets of pores arranged petal pattern. The pores are used to move sea water into its internal water-vascular system which allows for movement.
Sand dollars live beyond mean low water on top of or just beneath the surface of sandy or muddy areas. The spines on the somewhat flattened underside of the animal allow it to burrow or to slowly creep through the sand. Fine, hair-like cilia cover the tiny spines. These cilia, in combination with a mucous coating, move food to the mouth opening which is in the center of the star shaped grooves on the underside of the animal. Its food consists of plankters and organic particles that end up in the sandy bottom.
http://bss.sfsu.edu/geog/bholzman/courses/Fall02%20projects/sandollar/sanddollar.html