THORNY OYSTERS AND OTHERS 



1 Royal Thorny Oyster, Spondyhis regius. 



2 Twisted Ark Shell, Area torluosa. 



3 Uemicardium sp. 5 NiroI),ir Thorny Oyster, Spondylus Nicobaricus. 



4 Imperial Thorny Oyster, Spondylus impcrialis. 



