STAGE "I?' 3 DAYS. 



In the oldest larvae I have, the metamorphosis 

 das ^eori almost completed. The larval organ has i 

 ly ^isapp? ,' rt of it s be- 



ins found sticking to the -al dish 



or ths young pentagonal st r. 



When living the little ophiurido elung to the 

 bottom and sides of the aquari . .. tgh 

 the ciliated bands were still evident oh the dish 

 their frcs swimming habits bed been wholly ;ivon up. 



The. pore canal still opens on the aboral sur- 

 face but with the growth of the latter it is tr - 

 eling toward the 3dge of the lis!: and by a continu- 

 ation of this process the oral surface will ultim- 

 ately be reach I. 



As the closure of the gr ~ r the nerv= 

 ous syst::a toed place circular areas below the tips 



= tentac] n, the tentacle pores, 



and through these the tentacles were able to protrude 

 ves. 



The subneural sinuses wl icl - n to be 

 fsr:asd in "F" have been completed in the sight 

 larva .Figs. 31 and 34. ss. In "H" then the nervous 



