TRANSCRIBER’S NOTES: —Obvious print and punctuation errors were corrected. —Superscripts have been rendered as a^b or a^{bc}. —Subscripts have been rendered as a_{b}. —Bold text has been rendered as =bold text=. MENTAL EVOLUTION IN MAN BY THE SAME AUTHOR. _Crown 8vo. 5s._ =JELLY-FISH, STAR-FISH, AND SEA-URCHINS.= Being a Research on Primitive Nervous Systems. [_International Scientific Series._ _Crown 8vo. 5s._ =ANIMAL INTELLIGENCE.= Fourth Edition. [_International Scientific Series._ _Demy 8vo. 12s._ =MENTAL EVOLUTION IN ANIMALS.= Second Thousand. With a Posthumous Essay on Instinct by CHARLES DARWIN, F.R.S. LONDON: KEGAN PAUL, TRENCH & CO. [Illustration] MENTAL EVOLUTION IN MAN _ORIGIN OF HUMAN FACULTY_ BY GEORGE JOHN ROMANES, M.A., LL.D., F.R.S. [Illustration: LOGO] LONDON KEGAN PAUL, TRENCH & CO., 1, PATERNOSTER SQUARE 1888 (_The rights of translation and of reproduction are reserved._) PREFACE. In now carrying my study of mental evolution into the province of human psychology, it is desirable that I should say a few words to indicate the scope and intention of this the major portion of my work. For it is evident that “Mental Evolution in Man” is a subject comprehending so enormous a field that, unless some lines of limitation are drawn within which its discussion is to be confined, no one writer could presume to deal with it.