Canada 2014 - the 100 year anniversary of the opening of the
Royal Ontario Museum in 1914.
Stamps from the souvenir sheet:

Two different <P> Permanent-denomination (2014 - 85c each) stamps, issued in a se-tenant, self-adhesive, 10-stamp booklet format, plus two Permanent se-tenant stamps as part of water-activated gum, souvenir sheet, with different perforations than the self-adhesive versions, and a souvenir sheet FDC (First Day Cover), all issued on April 14, 2014.
Note: perforations not measured by me yet.
All stamps using lithograohy printing in five colours.
Tullis Russell Coatings paper (
C). Traffic-light, color dots on SS sheet:

The First Day Cancel (postmark) is from Toronto, Ontario (ON) showing, along with the traffic-light, colour-dots, I think partially a combination of Ionic-type of capital voluting, top of a pillar of Grecian design.

FDOI cancel shown with a pic from Wikipedia of Ionic capitals.
Two matching postcards (not shown by me) were also issued, showing magnified versions of the stamps, with printed-on endicia (indicia) stamps on their obverse.
Stamps
have only a three-sided fluorescent tagging, not measured be me yet, around the outer edges of the se-tenant pair; one side, the inner side of the stamp pair, being blank or tagent absent.
Being a natural history buff myself, I think this is one of Canada's more fascinating stamp issues.
What are all these foreign, mysterious archaeological artifacts, ancient bones of creatures long dead, past remembering, statues of people or deities revered by other people in far away lands?
Now kept in the Royal Ontario Museum in Toronto, Ontario, Canada,
World Cultures and Natural History to surprise you!.
http://en.wikipedia.org/wiki/Royal_Ontario_Museum