Page:Popular Science Monthly Volume 71.djvu/555

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way can relief be secured from a condition which is confusing and exasperating.

As an illustration of Agassiz's firm adherence to his principles of classification so clearly elaborated in his famous essay on the subject, I may be excused for giving a letter written to me a few days after I had explained to him my views regarding the systematic position of the Braciopoda:

Your statements of last Saturday haunt me and I can not rest before I have seen more of your facts concerning the Anneliden affinities of the brachiopods. The most telling evidence in your favor you have never yet alluded to, at least not in my presence. But I must be cautious and wait till I see and hear more of your facts. When and where can I see you again? This is not a question of structural complication.