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Published online by Cambridge University Press: 31 May 2012
There will hardly be a naturalist who has not spent considerable time to study the questions–What is a genus, and what are generic characters? Indeed, work is nearly impossible without having taken a position with regard to these questions. A full record of the literature, even the most condensed one, would be here out of p1ace, but I have been induced by a recent and most surprising discovery bearing upon this question to make this communication.