A lower Tertiary foraminiferal assemblage from the Arctic Coast of Canada contains 18 species. Two species are new, Cyclammina arctica and Cyclammina borealis. The fauna was recovered from a core of the Reindeer well drilled in the Mackenzie delta area. The faunal assemblage suggests a correlation with an outcrop section near Coal Mine Lake (lat. 68°40^prime46^PrimeN; long. 130°20^prime11^PrimeW).

The age assigned to the microfauna is Oligocene-Miocene, and the assemblage has an affinity with Tertiary faunas of the circum-Pacific area. The depositional environment suggested is deep, cold, marine water.

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