VI.
INDEX.
Darwin, Charles—(continued).
law of economy, 511, 513-4; on
organic suppression, 512-3; on
degenerate organs not influenced
by Natural Selection, 515-6 ; on
importance of nascent organs,
517; on fully-developed useless
organs, 518; on geographical
distribution, 526-7, 530-1.
Darwin, Prof. George H. : on
variation, 11-12.
Darwinism : Pure, 349-88 ; Mixed,
389-448.
Death : v. Life, Destruction of.
Deer : parental devotion of, 83 ;
isolation in breeding, 380—v.also
Antelope, Buck, Stag.
Degeneration, Organic : 506-12.
Descartes, Rene : on theory of
creation of world by God for
benefit of man, 127.
Desert Animals : colouration of,
193-4 ; cause of colouration of,
404-5.
Plants : storage of water
by, 414.
Dewitz : on queens and workers
of ants produced from different
kinds of eggs, 268.
Digitalis, Imported : variation in,
534-
Dorfmeister (quoted by Eimer) :
on influence of temperature on
colouration and markings of
butterflies, 405, 406.
Disuse : v. Use and Disuse.
Dixon, Charles : on the ex
aggerated importance of theory
of Natural Selection, 589.
Dogs : Mr. Romanes’ pictures of,
as the outcome of Artificial
Selection, 151-2 ; instinct in, 243 ;
barking, 255-6; pointing, 257;
compensation of growth in, 336 ;
hybridisation of, 356 ; recent
evolution of some breeds, 359 ;
influence of external conditions
on, 397, 423—v. also Grey
hounds.
Ancon : 359.
Domestication : its facts illustrate
the action of Natural Selection
and of Sexual Selection, 148-50
—v. also Artificial Selection.
Dragon-flies : protective coloura
tion of, 173.
Drummond, Prof. Henry : on
“bird-droppings,” 174-5 » on de
fensive colouration of puff-adder,
205.
Drosera : v. Sun-dew.
Ducklings : aquatic instincts in,
and their loss, 259-61 ; maternal
education of, 261.
Ducks : incubating instinct of, 265.
Duncan, Dr. : on instinct in but
terflies, 263.
Duval : on improved varieties of
pears arising under natural con
ditions, 141.
Eagle, Golden : dangers to its life,
61.
Economy, Law of : v. Parsimony,
Law of.
Edmonston, Dr. (quoted by Dar
win) : on influence of external
conditions on lams arge?itatus
and raven, 396.
Eimer, Prof. G. H. Th. : on the
work of a scientist, 159 ; on iso
lation in breeding of lizards, 381 ;
on cause of colouration in butter
flies, 405, 406, 407.
Eisig, Dr. : on pigments in skin
the cause of nauseous taste, 219.
Eland : an illustration of Law of
Parsimony, 481.
Elephant : rate of increase, 46.
“ Eliot, George” : quotation from
Romola, 21 ; from Middlemarch,
75 ; from Mill on the Floss, 471 ;
from Silas Marner, 471.
Elk : evolution of, from stag, 343,
345-6.
Embryology : as evidence for
Natural Selection, 541-9.
Emperor-moth : sexual aroma of
female, 37.
ENCYCLOPAEDIA BRITAN
NICA : on instinct, 123 ; on
maternal education of ducklings,
261 ; on ventral fins of gobies,
505-
Environment : direct action of, in
dependently of Natural Selection,
167-70 ; effect of, on colouration,
189 ; accidental colouration with
