A "schilderiana" is just a big regular tigris that happens to be from Hawaii. There are no morphological differences between large Hawaiian Cypraea tigris and equally large Cypraea tigris from anywhere else. It is true that the largest known specimens have come from Hawaii, and also that large specimens are more common in Hawaii than elsewhere. But that is not a valid reason for taxonomic separation. I currently have a 118 mm specimen from the Philippines. The name "schilderiana" should be trashed once and for all, IMHO. Regards, Paul M.