ECHINODERMS 



61 



body cavity at will, living apparently with its strange host 

 in a state of commensalism. 



k.R .B. 



w • ._.,-, • — .. ■•- 



f • . '- * r - * * 



SV »'.-.• '- '. -• «» 



Sea Gherkin {Cucumarid) 



Sea Cucumbers play a very important part in the steady 

 dissolution of coral reefs, which takes place almost as fast 



