The larvae feed on "Astragalus echinus" and "Onobrychis" species. He came to Toronto as Co-adjutor Bishop and Titular Bishop of Echinus in 1859. The specific epithet "echinatum" comes from "echinus" which means sea urchin or hedgehog. After this the larva develops an echinus or juvenile rudiment, which will become the juvenile. The echinus itself is decorated with an egg-and-dart motif. The volutes of an Ionic capital rest on an echinus, almost invariably carved with egg-and-dart. The part of the capital that rises from the column itself is called the "echinus". The ancient see of Echinus has been revived as a Roman Catholic titular bishopric. At 75 days a rudimentary echinus appeared and at 116 days, podia were apparent. Echinus is a genus of sea urchins. Polymastia echinus is a species of sea sponge belonging to the family Polymastiidae. Echinus is the largest acid-water geyser in the world.