PROF. C. A. KOFOID delivered, on December 27 last in Boston, an address as vice-president of Section F (Zoology) of the American Association for the Advancement of Science and as president of the ...
THE physiology of encystment and excystment of Protozoa and other micro-organisms has received little attention. In the case of the ciliate Colpoda cucullus, it has been earlier shown 1 that emergence ...
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