392 
Working hypothesis, 255. 
World as it is, 264. 
that is, 274. 
Worship, 373. 
‘Wirtemberger on the law of develop- 
ment, 233. 
Yolk of egg, 39. 
Youatt on selective breeding, 19. 
FOOT-NOTES TO EVOLUTION. 
Youmans on life in New Zealand, 
202, ° 
Zahme Xenien, 118. 
Zangwill on the ‘higher foolish- 
ness,” 290. 
Zittel on ammonites, 246. 
ZoGlogical Record, 2. 
Zy gotes, 165, 
THE END. 
