Chap, ix.] DENDROPHYLLIA. 285 



largely composed of foreign material ; nor is there any- 

 complete internal skeleton. The cuticle may be soft 



.Fig. 118 c. Coral. Dendrophyllia ramosi. 



and ciliated, as in the Tiirbellaria, or become very 

 firm and appear to be formed of a chitiiious substance, 

 as in the Nematoidea, or still more in the Rota- 

 toria, where it maybe join ted and have muscles inserted 



