Ah, the Comanchic and Eogene periods. And the KT event only 3.1 Mya. I didn't realize such things were believed in 1915.
A web search for "Eogene" turns up papers as late as the '30s.
I've never heard of these before, and can't seem to find a history of either term on the web. Are these older names for certain units (Early Cretaceous, Paleocene) or do they reflect erroneous ideas about correlated strata?
-- Mike Keesey