Excerpt from Memoirs of the Museum of Comparative Zoology at Harvard College, Vol. 20: The North American Crinoidea Camerata
Since the publication of our first paper on the Crinoids, it has been our aim to direct our special attention to studying the morphology of the vari ous groups as they appeared to us, with a view to future classification, and to revise the work of the previous writers. The various classifications which had been proposed were not based upon strictly morphological principles, and in many cases widely distinct forms were placed together in the same group.
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