The skull you see in the photos was collected in 1916 from what is known today as Dinosaur Provincial Park, AB by famous paleontologist C.H. Sternberg for the NHM London. The remains were described as 'nothing but rubbish' by palaeontologist A.S. Woodward and sat in collections for the best part of a century.
It was not until the nineties that a team of scientists, including Andy Farke and NHM dinolab found the remains and realized that they might be of a new species! As with most centrosaurine ceratopsians, the key was in the pattern of ornamentation (spikes and hooks) at the rear of the parietal, the bone forming the central section of the frill. Although fragmentary and in poor condition, enough unique features were identified to confirm it as a new species. Named Spinops sterbergorum in honor of Sternberg, who first discovered it 102 year ago.
Original paper
http://www.app.pan.pl/article/item/app20100121.html
Photos and information courtesy of Andrew Knapp