Part I.— THE DESCENT OF MAN. 
CHAPTER I. 
: j 1 
The Evidence of the Descent of Man from some 
Lower Torh. 
Mature of the evidence hearing on the origin of man — Homologous, 
structures in man and the lower animals — Miscellaneous points 
of correspondence — Development — Rudimentary structures, 
muscles, sense-organs, hair, bones, reproductive organs, &c. — 
The hearing of these three great classes of facts on the origin 
of naan. 
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 
J°dily structure and in mental faculties; and if so, 
whether the variations are transmitted to his offspring 
ln 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 
•same 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. ? I s man subject to similar malconformations, 
le ^sult 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 ? 
nnght also naturally be enquired whether man, like 
S(J many other animals, has given rise to varieties and 
SU traces, differing but slightly from each other, or to 
