. The biology of the protozoa. Protozoa; Protozoa. THE BIOLOGY OF THE PROTOZOA BY GARY N. CALKINS, , PROFESSOR OF PROTOZOOLOGY, COLUMBIA UNIVERSITY SECOND EDITION, THOROVOHLY REVISED ILLUSTRATED WITH 223 ENGRAVINGS AND 2 COLORED PLATES. LEA & FEBIGER PHILADELPHIA 19 3 3. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Calkins, Gary N. (Gary Nathan), b. 1869. Philadelphia, Lea & Febiger

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