1895.] 
Repetition. 
trogressive to 
present and past type. 
(a) Repetition of pa- 
rental type. 
(b) Regression to pres- 
ent race type usually in 
ee fee characters(=Vari- 
ation from present paren- 
tal ehar 
(c) Reversion to past 
Search for the Unknown Factors of Evolution. 
HEREDITY. 
Variation. 
A. Neutral both as re- 
gards present or future 
type. Including anom- 
alies and abnormalities 
which are purely individ- 
ual phenomena not in the 
path of evolution. 
B. Progressive to fu- 
ture type. 
(a) Ontogenic varia- 
is from parental type 
in one or more charac- 
ters. 
(b) Ontogenic variation 
from present race in sev- 
eral characters (—a new 
sub-type). 
(e) ee ase or con- 
race type, usually in few stant va n towar 
or single characters 
(=Variation from pres- 
ent race 
Palingenic Variation. a of parental 
type 
Cinidpoiäe Variation. 
The most profound gap in time is between ‘ palingenic vari- 
ations,’ springing from the past history of the individual, and 
‘cenogenic variations, which have to do only with present and 
future history. The former embraces more than reversion. 
This table gives us only our first impression of this plane of 
time so lightly regarded by Bateson, if indeed discrimination 
is possible among data of the kind he has collected. The 
distinctive import of human anatomy’? is that a comparison of 
the past and present habits of the race, or of the uses to which 
bones and muscles have been and are now being put, opens a 
possible analysis of variations both as regards their time of 
origin and as regards their fitness to past, present, or future 
uses; it is thus an inexhaustible mine for the philosophical 
study of variation—of which only the upper levels have been 
worked.” Beside the human organism there is no other within 
°R. Wiedersheim: Bau des Menschen als Zeugniss seiner Vergangenheit. 
Freiburg, 1887. 
vH. F. Osborn: Present Problems in Evolution and Heredity. 
wright Lectures. I. The Contemporary Evolution of Man, etc. Wm 
Co., New York, 1891. 
The Cart- 
. Wood & 
