 In 1916 , Brown expanded the character set to include more features ; in the revised version : a comparatively short skull with a high helmet @-@ like crest formed by nasals , prefrontals and frontals ; the nasals not being separated in front by premaxillaries ; a narrow beak , expanded section in front of the elongated nares ; a small narial opening ; a <unk> formula of 15 <unk> , 19 <unk> , 8 <unk> , and 61 + <unk> ; possession of dorsal spines of a medium height ; high anterior caudal spines ; long chevrons ; long <unk> , possessing a blade of medium width ; a radius considerably longer than humerus ; comparatively short <unk> ; an <unk> <unk> <unk> ; a long <unk> with a foot @-@ like terminal expansion ; a <unk> with an anterior blade that is short and broadly expanded at end ; a <unk> that is longer than the tibia ; the phalanges of <unk> are short ; that the integument over the sides and tail composed of polygonal <unk> scales without pattern but graded in size in different parts of the body ; and a belly with longitudinal rows of large conical <unk> @-@ like scales separated by uniformly large polygonal tubercles . Again , the presumed traits of the snout are incorrect because Brown confused the praemaxillae with the nasal bones and the nasal bones with the frontals . Most of the <unk> traits are today known to be shared with other lambeosaurines . 
