Fig 31 — AmcEboid movements of young egjj-cells. a, AiiiocboiU o\ um of Hydra 

 (from Balfour, after Kleinenberg) ; b, early ovum of Toxopneustes variegatus, with 

 pseudopodia-like processes (from Balfour, after Selenka) ; c. ovum of Toxopneustes 

 lividus, more nearly ripe (from Balfour, Hertwig). Ai to A 4, the primitive egg-cell 

 of a Chalk-Sponge {Leuculmis echinus)^ in four successive conditions of motion. 

 B I to B 8, ditto of a Hermit-Crab (Chondracanthtis cornutus\ in eight successive 

 stages (after E. von Beneden). C i to C >;, ditto of a Cat, in five successive stages 

 (after Pfluger). D, ditto of Trout ; E, of aHen ; F, of Man. The first series is taken 

 from the Encycl. Brit. ; the second from Hackel's Evolution of Man. 



