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THE AMERICAN NATURALIST 



[Vol. LIV 



dioides) out of 60 fish contained Ophiuroids ; 10 out of 25 

 G. aglefinus, contained echinoderms (Ophiuroids and 

 Echinocyamus), and one gray gurnard (Trigla gur- 

 nardes) out of 150 fish also contained echinoderms. 



From the findings of Brunchorst and Carr it is seen 

 that various kinds of fish feed on echinoderms, whence 

 the suggestion that echinoderms be used as bait. How- 



ever, it may be that for a number of forms echinoderms 

 are resorted to only when other food is out of reach, 

 though the common dab, according to Carr, appears to 

 eat them during the greater part of the year. The long 

 rough dab feeds less on echinoderms than the common 

 dab, perhaps owing to a difference in migration habits of 

 the two. 



A large part of an echinoderm industry would be bi- 

 produets, since the main bulk of the starfish consists of 

 material best suited for guano. No absolute waste ma- 

 terial need remain ; all of the animal may be utilized. In- 

 directly, the shell-fish industries would be benefited by 



