Chap. II. RECAPITULATION. 47 



stages. About a fortnight is required for the egg to pass through its different stages, 

 for the embryo to be hatched, and the larva to have reached the condition when 

 the young Starfish is ready to resorb the Brachiolaria ; and another week must 

 elapse before it reaches the stage represented in PI. VI. Fig. 11. Those which I 

 raised from eggs artificially fecundated retained this shape four months. 



