Dr. Hector described a collection of minerals made by Mr. McKay at Wade, Auckland, where serpentine contains ores of zinc and baryta. These are probably of the age of the auriferous injections of Coromandel, which belong to the cretaceous period, and not to the older reefs of Otago or Reefton. Igneous rocks from the Queen of Beauty Mine, Makara, also collected by Mr. McKay, were shown, which proved to be of the same composition and structure as those at the Thames and Wade.