FIG. 19. COMMON STARFISH (Aslerias rubens), REGENERATING 



LOST ARMS. 



It shows at the top two arms which are just beginning to be regrown. 

 Ona of the original five arms has been regrown double. The madreporic 

 plate, a perforated entrance to the water- vascular system, is seen on 

 the disc between the two upper arms. The figure is taken from Prof. 

 W. C. M'Intosh's atlas of the Fauna of St. Andrews Bay. 



69 



