[171] Carpenter’s Report on the results obtained by the Microscope in the Study of Anatomy and Physiology, 1843.
[172] See Dr. Martin Barry on Fissiparous Generation; Jameson’s Journal, Oct. 1843. Appearances precisely similar have been detected in the germs of the crustacea.
[175] Mr. Leonard Horner and Sir David Brewster, on a substance resembling shell.—Philosophical Transactions, 1836.
[179a] Dr. Allen Thomson, in the article Generation, in Todd’s Cyclopædia of Anatomy and Physiology.
[179b] The term aboriginal is here suggested, as more correct than spontaneous, the one hitherto generally used.
[182] Article “Zoophytes,” Encyclopædia Britannica, 7th edition.
[187] See a pamphlet circulated by Mr. Weekes, in 1842.
[195] Daubenton established the rule, that all the viviparous quadrupeds have seven vertebræ in the neck.
[201] Lord’s Popular Physiology. It is to Tiedemann that we chiefly owe these curious observations; but ground was first broken in this branch of physiological science by Dr. John Hunter.
[204] When I formed this idea, I was not aware of one which seems faintly to foreshadow it—namely, Socrates’s doctrine, afterwards dilated on by Plato, that “previous to the existence of the world, and beyond its present limits, there existed certain archetypes, the embodiment (if we may use such a word) of general ideas; and that these archetypes were models, in imitation of which all particular beings were created.”