Note 20 — Chapter I

I had written a rough copy of this chapter before reading a valuable paper, “Caratteri rudimentali in ordine all’origine del uomo” (‘Annuario della Soc. d. Nat.,’ Modena, 1867, p. 81), by G. Canestrini, to which paper I am considerably indebted. Häckel has given admirable discussions on this whole subject, under the title of Dysteleology, in his ‘Generelle Morphologie’ and ‘Schöpfungsgeschichte.’