Derek, don't be bummed!!! Spaths are one of my favorites acros ever! That's why I can spot them from across a room. You can tell by the tips, or the lead corallites. If you notice, millies have a pronounced corallite. They kind of poke out a bit. Spaths have tips that form a kind of rounded point. Much rarer than millies, and VERY sensitive to fluctuations in chemistry. They are infamous for being one of the worst all time shippers (particularly wild colonies), so if you have a healthy one, you are lucky. They are closely related to milleporas, and endemic to a small area in Australia. For reference, here are a couple of links and pics of other Spathulatas so you can get familiar with the differences.Really. thats nice to know. Kinda bummed tho. Lol
http://www.liveaquaria.com/diversden/ItemDisplay.cfm?c=2733+2&ddid=268055
http://www.liveaquaria.com/diversden/ItemDisplay.cfm?c=2733+2&ddid=268053
http://www.liveaquaria.com/diversden/ItemDisplay.cfm?c=2733+2&ddid=266015
And here is one I recently bought that unfortunately couldn't survive 14 hours of mild weather shipping:


