[20] Harvey's venous artery and arterial vein correspond respectively to the pulmonary vein and the pulmonary artery of our nomenclature. [21] Harvey: On the Motion, etc., VI, Syd. 39, l. 29 to 40, l. 15; Op. Omn. 41, l. 20 to 42, l. 10. [22] Compare Aristotle: History of Animals, 511_b_, 10-24. [23] Harvey: On the Motion, etc., XVII, Syd. 85, l. 17-25; Op. Omn. 87, l. 5-12. [24] Aristotle: On Youth and Old Age, On Life and Death, 469_b_, 6-20. [25] Aristotle: On Respiration, 473_a_, 8-10. [26] Aristotle: On the Generation of Animals, 732_a_, 18-20. [27] Aristotle: On Youth and Old Age, On Life and Death, 469_a_, 28 to 470_a_, 18. On Respiration, 474_a_, 25 to _b_, 24; 478_a_, 26 to _b_, 21; 480_a_, 18 to _b_, 20. [28] Aristotle: On Respiration, 478_a_, 21-30. [29] διὰ τὴν σύναψιν. [30] Aristotle: History of Animals, 496_a_, 27-32. [31] Hippocrates: On the Heart, Lit. Vol. IX, 86 and 90-92. [32] Hippocrates: On the Heart, Lit. Vol. IX, 86-88. [33] Galen: On the Use of Respiration, Kn. Vol. IV, 487-493. [34] ποιότητος. [35] Galen: Is Blood Naturally Contained in the Arteries? Kn. Vol. IV, 724-725. [36] Galen: On the Use of Respiration, Kn. Vol. IV, 510. [37] Galen: On the Use of the Parts, etc., Kn. Vol. III, 412; Dar. Vol. I, 381. [38] Galen: On the Use of the Pulse, Kn. Vol. V, 149-180. [39] Harvey: On the Motion, etc., Preface, Syd. 9-14; Op. Omn. 9-14. [40] Galen: On the Use of the Parts, etc., Kn. Vol. III, 636-656; Dar. Vol. I, 541-552. [41] Harvey: Prelectiones, 86 right. [42] Compare Hippocrates: On Flatus, Lit. Vol. VI, 96. [43] Harvey: Prelectiones, 86 right. [44] Galen: On the Use of Respiration, Kn. Vol. IV, 470-471. [45] Harvey: Prelectiones, 86 right. [46] Aristotle: On Respiration, 473_a_, 15 to 474_a_, 24. Hippocrates: On the Sacred Disease, Lit. Vol. VI, 368 and 372. [47] Hippocrates: On the Sacred Disease, Lit. Vol. VI, 368. [48] Passages which justify the statements here made are among those cited in note 140. [49] Galen: Is Blood Naturally Contained in the Arteries? Kn. Vol. IV, 703-736. [50] Galen: On the Use of the Parts, etc., Kn. Vol. III, 541-542; Dar. Vol. I, 476. [51] Plato: Timæus, 69_c_-_d_. Archer-Hind's Edition, 254, l. 13 to 256, l. 6. [52] Aristotle: On Soul, 412_a_, 1 to 415_a_, 13. [53] Galen: On the Doctrines of Hippocrates and Plato, Kn. Vol. V, 608. [54] Galen: On the Use of the Parts, etc., Kn. Vol. III, 696-703; Dar. Vol. I, 575-579. See also Rapp: "Ueber das Wundernetz," Meckel's Archiv für Anatomie und Physiologie, 1827, 1-13. [55] Galen: On Methods of Treatment, Kn. Vol. X, 839-840.