skull found in 1920 and wouldn't be reunited with the rest of its remains until 2012. Description Size Benson et al. (2012) estimated that Corythosaurus has an average length of . In 1962, Edwin H. Colbert used models of specific dinosaurs, including Corythosaurus, to estimate their weight. The Corythosaurus model used, was modelled by Vincent Fusco after a mounted skeleton, and supervised by Barnum Brown. After testing, it was concluded that the average weight of Corythosaurus was . The total length of Corythosaurus specimen AMNH 5240 was found to be , with a body mass close to . In 2016, Gregory S. Paul estimated that C. casuarius reached in length and in body mass and that C. intermedius reached in length and in body mass. A "morphologically adult-sized specimen" of C. casuarius measured approximately in body length. Proportionally, the skull is much shorter and smaller than that of Edmontosaurus (formerly Trachodon), Kritosaurus, or Saurolophus, but when including its crest, its superficial area is almost as large. Skull Over twenty skulls have been found from this dinosaur. As with other lambeosaurines, the animal bore a tall, elaborate bony crest atop its skull, which contained the elongate narial passages. The narial passages extended into the crest, first into separate pockets in the sides, then into a single central chamber and onward into the respiratory system. The skull of the type specimen has no dermal impressions on it. During preservation it was compressed laterally, so now the width is about two-thirds what it would have been in real life. According to Brown, the compression also caused the nasals to shift where they pressed down on the premaxillaries. Because they were pressed on the premaxillaries, the nasals would have closed the nares. Apart from the compression, the skull appears to be normal. Contrary to what Brown assumed, the areas concerned were fully part of the praemaxillae. The crests of Corythosaurus resemble that of a cassowary, or a Corinthian helmet. They are formed by a combination of the praemaxillae, nasals, prefrontals and frontals, as in Saurolophus, but instead of projecting backwards as a spine, they rise up to make the highest point above the orbit. The two halves of the crest are separated by a median suture. In front of the orbit, the crest is made of thick bone. The nasals make up most of the crest. Brown assumed that they extended from the beaks'