Chap. III. POSITION OF THE MADREPORIC BODY. 53 



which future examination must verify; but it seems to me such a natural expla- 

 nation of the whole difficulty, that I give it here for what it is worth. The multi- 

 plication of madreporic bodies in many Starfishes need not invalidate the view I 

 have taken of its value, as we need only ascertain which is the original one, the 

 others being only supplementary. I have found larvae with two water-pores (madre- 

 poric bodies), but I have never succeeded in raising them. 



