How were the 4 colonies in Canada reorganized in 1867?

In 1867, there were more than four colonies. Only three of them were reorganized into the new country named Canada. They were Nova Scotia, New Brunswick, and the pre-Confederation Province of Canada which, upon Confederation, was severed into the provinces of Québec and Ontario. (See sections 3 and 6 of the British North America Act (now the Constitution Act).