410 



EVOLUTION AND ANIMAL LIFE 



Fig, 252. — The mousefish, Pterophryne histrio, in the Sargassum or Gulf weed. The 

 fishes are marked and colored so as to be nearly indistinguishable from the mass of 

 the Gulf weed. In the lower right-hand corner of the figure are two seahorses, also 

 shaped and marked so as to be concealed. 



