LIST Of FIGURES 



XXI 



CHAPTER VIII 



FIG. 



i68. Geometrical relations of cleavage-planes in plants 



169. Cleavage of Synapta . 



1 70. Cleavage of Polygordins 



171. Cleavage of iVt're'/i 



172. Variations in the third cleavage 



173. Meroblastic cleavage in the squid 



174. Rudimentary cells in Aricia 



175. Teloblasts of the earthworm 



176. Contradiction of Hertwig's rule in Ascaris 



177. Bilateral cleavage in tunicates 



178. Bilateral cleavage in Loligo . 



1 79. Eggs of Loligo 

 I So. Eggs and embryos of Corixa 

 181. Variations in axial relations of Cyclops 



jOj 



365 

 367 

 369 

 370 

 372 



-> •- T 

 0/ J 



374 

 376 

 380 



381 

 382 



383 



385 



CHAPTER IX 



1S2. Half-embryos of the frog .... 



183. Half and whole cleavage in sea-urchins 



184. Normal and dwarf gastrulas of ^/«//i/(7.r«5 . 



185. Dwarf and double embryos of .4w//^/oxM.y . 



186. Cleavage of sea-urchin eggs under pressure , 



187. Cleavage of AV/v/i-eggs under pressure 



188. Diagrams of cleavage in moUusks and polyclades 



189. Partial larvoe of ctenophores ... 



190. Partial cleavage in Ilyanassa 



191. Double embryos of frog .... 



192. Cleavage in Crepidula .... 



193. Normal and modified larvae of sea-urchins . 



194. Regeneration in coelenterates 



400 

 407 

 408 

 409 

 411 

 412 

 414 

 418 

 420 

 421 

 424 

 428 

 429 



