by William Swainson, Zoological Illustrations Series II… (1829)
“ We must also state, that upon closely comparing them with a series of E. Philodice, we have failed to discover what appears to us a true specific distinction. The same unsuccess has attended our efforts to detach Chrysotheme from Edusa, of which latter we possess specimens from Germany, Genoa, Sicily, Greece, Africa, and several others unlabelled, all varying more or less from each other, and from British examples. ”
