Sunday world

[ginvodka]

Badly stuck in the lower right corner of crossword: 24a Any of several large owls of the genus Bubo, having prominent feathers on each side of head (5,4) ??g?e, ?w?? 19d In Greek philosophy, the exercise of reason; in psychology, the functioning of the intellect? (6) n???i? 28a The formation of bony tissue over connective or other tissue (8) ?s?e?s?? 21d Members of a N. American indian people formerly of Western Missouri, now living in northern Oklahoma (6) ???g??
Any help would be appreciated, thanks in advance

[moonshadow]

24a) Eagle Owls

[ginvodka]

Thanks for that, it kick started the corner, so all I have left to do is:
The formation of bony tissue, especially over connective or other tissue (8) ?s?e?s?s

Thanks in advance

[moonshadow]

Osteosis