Studies on Blood and Blood Parasites. I. Observations on Mammalian Blood with Dark-field Illumination. II. The Priority of "Cryptobia" (Leidy) 1846, Over "Trypanoplasma" (Laveran and Mesnil) 1901. III. "Trypanosoma Americanum" N. Sp., a Trypanosome which Appears in Cultures Made from the Blood of American Cattle ... By Howard Crawley ...