found in 1914 by Brown and Peter Kaisen. Both specimens are now housed in the American Museum of Natural History in their original death poses. The type species Corythosaurus casuarius was named by Barnum Brown in 1914, based on the first specimen collected by him in 1912. AMNH 5240 is thus the holotype. In 1916, the original author, Brown, published a more detailed description which was also based on AMNH 5338, which specimen is therefore the plesiotype. Corythosaurus is among many lambeosaurines that possess crests, and it was the crest that lends Corythosaurus its name. The generic name Corythosaurus is derived from Greek κόρυθος, korythos, "Corinthian helmet", and means "helmeted lizard". The specific name casuarius refers to the cassowary, a bird with a similar skull crest. The full binomial of Corythosaurus casuarius thus means "Cassowary-like reptile, with a Corinthian helmet crest". The two best preserved specimens of Corythosaurus found, by Charles H. Sternberg in 1912, were lost on 6 December 1916 while being carried by the SS Mount Temple to the United Kingdom, during World War I. They were being sent to Arthur Smith Woodward, a paleontologist of the British Museum of Natural History in England, when the ship transporting them was sunk by the German merchant raider in the middle of the ocean. There were formerly up to seven species described, including C. casuarius, C. bicristatus Parks 1935, C. brevicristatus Parks 1935, C. excavatus Gilmore 1923, C. frontalis Parks 1935, and C. intermedius Parks 1923. In 1975 Peter Dodson studied the differences between the skulls and crests of different species of lambeosaurine dinosaurs. He found that the differences in size and shape may have actually been related to the gender and age of the animal. Now only one species is recognized for certain, C. casuarius, although C. intermedius has been recognized as valid in some studies. It is based on specimen ROM 776, a skull found by Levi Sternberg in 1920 and was named by William Parks in 1923, who had originally named it Stephanosaurus intermedius earlier that year. The specific name of C. intermedius is derived from its apparent intermediate position according to Parks. C. intermedius lived at a slightly later time in the Campanian than C. casuarius, and the two species are not identical, which supported the separation of them in a 2009 study. The invalid species C. excavatus specimen UALVP 13 was based on only a