 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 . 
 Over twenty skulls <a href='been_done' title='1'><mark>have</mark></a> 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 <a href='got' title='2'><mark>has</mark></a> 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 <a href='uninflect' title='3'><mark>were</mark></a> pressed on the premaxillaries , the nasals would <a href='been_done' title='4'><mark>have</mark></a> closed the nares . Apart from the compression , the skull <a href='uninflect' title='5'><mark>appears</mark></a> to be normal . Contrary to what Brown assumed , the areas concerned <a href='uninflect' title='6'><mark>were</mark></a> fully part of the praemaxillae . 
Ova twenty skulls done been found from this dinosaur . As with other lambeosaurines , da animal bore a tall , elaborate bony crest atop its skull , which contained the elongate narial passages . Tdanarial passages extended into the crest , first into separate pockets in the sides , then into a single central chamber and onward into the respiratory system . Thdakull of thedape specimen got no dermal impressions on it . durin preservation it was compressed laterally , soo now the dath is about two @-@ thirds what it would have been in real life . According to Brown , the cdaression also caused the nasals to shift where they pressed downn on the premaxillaries . cuz they was pressed on the premaxillaries , the nadas would done closed the nares . Apart from the compression , the skudaappear to be normal . Contrary to what Brown assumed , the areadaoncerned was fully part of the praemdallae .