[170] Harvey: On Generation, Introduction, Syd. 167, l. 2-5; Op. Omn. 180, l. 23-26. [171] Harvey: On Generation, XIV, Syd. 226, l. 38 to 227, l. 16; Op. Omn. 240, l. 22 to 241, l. 3. [172] _Animalis._ [173] Harvey: On Generation, XLVI, Syd. 341, l. 25-37; Op. Omn. 357, l. 5-15. [174] That is, the mammalian embryo. [175] Harvey: On Generation, LIII, Syd. 392, l. 1-13; Op. Omn. 409, l. 1-12. [176] Harvey: On the Motion, etc., Dedication to the King, Syd. 3, l. 2-3; Op. Omn. 3, l. 2. On the Motion, etc., VIII, Syd. 47, l. 7-9; Op. Omn. 49, l. 13-14. [177] _Idque non solum in ovo, sed in omni fœtu, animaliumque conceptu primo contingere, mox palam fiet._ Harvey: On Generation, _Editio princeps_, 149, l. 33-35. In the Opera Omnia, 390, l. 1-3, a comma has been erroneously placed between "_conceptu_" and "_primo_"; the latter word qualifies "_conceptu_," not "_contingere_." Compare Op. Omn. 391, l. 4: _in primis animalium conceptibus_. [178] _In primis animalium conceptibus._ [179] Harvey: On Generation, LI, Syd. 373, l. 35 to 374, l. 27 and 374, l. 36 to 375, l. 8; Op. Omn. 389, l. 28 to 390, l. 22 and 390, l. 30 to 391, l. 8. [180] Harvey: Exercise to Riolanus, II, Syd. 137, l. 2-4 and 138, l. 12-13; Op. Omn. 136, l. 29-30 and 138, l. 6-7. [181] Milton: Areopagitica, edited with introduction and notes by J. W. Hales, Oxford, 1874, 38. [182] The "point" is the embryonic heart, to which in its earliest visible state the name of "_punctum saliens_," _i.e._, "leaping point," had been given, this technical term having been coined no doubt out of expressions used by Aristotle in speaking of the living rudimentary heart as seen with the naked eye in the hen's egg and in mammalian abortions. Compare Aristotle: History of Animals, 561_a_, 6-17; On the Parts of Animals, 665_a_, 33 to _b_, 2. [183] Presumably the terminal sinus of modern embryology. [184] The fourth day of incubation. [185] _Per totum colliquamentum._ For Harvey's account of this clear liquid see On Generation, XVI, Syd. 232, l. 15 to 234, l. 31; Op. Omn. 246, l. 4 to 248, l. 17. [186] Aristotle: History of Animals, Book VI, chapter 3. This reference is Harvey's own. Aristotle's words are πόροι φλεβικοί (561_a_, 13), which are given by Harvey as "_meatus venales_." [187] Harvey: On Generation, XVII, Syd. 237, l. 16 to 238, l. 12 and 238, l. 25-35; Op. Omn. 251, l. 6 to 252, l. 3 and 252, l. 15-22. [188] Harvey: On Generation, XIX, Syd. 252, l. 1 and l. 9-11; Op. Omn. 266, l. 3 and l. 11-13. [189] Harvey: On Generation, XVI, Syd. 415, l. 22-24; Op. Omn. 433, l. 22-24. [190] Harvey: On Generation, LVI, Syd. 415, l. 32-38; Op. Omn. 433, l. 31 to 434, l. 4. [191] Harvey: On the Motion, etc., IV, Syd. 30, l. 14-22; Op. Omn. 32, l. 8-14. [192] Harvey: On Generation, LI, Syd. 373, l. 35 to 374, l. 27; Op. Omn. 389, l. 28 to 390, l. 22. [193] ἡ ἀρχή. [194] ἀλλὰ καὶ περὶ τὴν τελευτήν. [195] ὤσπερ τῆς φύσεως διαυλοδρομούσης καὶ ἀνελιττομένης ἐπὶ τὴν ἀρχὴν ὄθεν ἠλθεν.