Note I-13 — Chapter I · ON THE ORIGIN OF THE AMERICANS.

'Were we to admit,' say some ethnologists, 'a unity of origin of such strongly-marked varieties as the Negro and European, differing as they do in colour and bodily constitution, each fitted for distinct climates, and exhibiting some marked peculiarities in their osteological, and even in some details of cranial and cerebral conformation, as well as in their average intellectual endowments,—if, in spite of the fact that all these attributes have been faithfully handed down unaltered for hundreds of generations, we are to believe that, in the course of time, they have all diverged from one common stock, how shall we resist the argument of the transmutationist, who contends that all closely allied species of animals and plants have in like manner sprung from a common parentage?' Lyell's Antiq. of Man, pp. 433-4.