Part I.— THE DESCENT OF MAN. 
CHAPTER I. 
The Evidence of the Descent of Man from some 
Lower Form. 
Feature of the evidence bearing on the origin of man — Homologous 
structures in man and the lower animals — Miscellaneous points 
of correspondence — Development — Rudimentary structures, 
muscles, sense-organs, hair, hones, reproductive organs, &c. — 
The hearing of these three great classes of facts on the origin 
of man. 
He who wishes to decide whether man is the modified 
descendant of some pre-existing form, would probably 
first enquire whether man varies, however slightly, in 
bodily structure and in mental faculties ; and if so, 
whether the variations are transmitted to his offspring 
in accordance with the laws which prevail with the lower 
animals; such as that of the transmission of characters 
to the same age or sex. Again, are the variations the re- 
sult, as far as our ignorance permits us to judge, of the 
«ame general causes, and are they governed by the same 
general laws, as in the case of other organisms ; for in- 
stance by correlation, the inherited effects of use and 
disuse, &c. ? Is man subject to similar malconformations, 
the result of arrested development, of reduplication of 
parts, &c., and does he display in any of his anomalies 
reversion to some former and ancient type of structure ? 
It might also naturally be enquired whether man, like 
so many other animals, has given rise to varieties and 
sub-races, differing but slightly from each other, or to 
