240 



ZOOLOGY 



absence of scales on the body. They are characteristic of 

 South America, but there are a large number of species in 

 the United States, mostly found in the Mississippi valley 



EVS 



\ v\ 





FIG. 222. One of the flatfishes, seen from the upper side. Two-thirds nat. 

 size. Photo, by W. H. C. P. 



and the Great Lakes, inhabiting deep or sluggish waters, 

 and living in the mud. The common New England 



FIG. 223. Ameiurus nebulosus, the catfish. About one-half nat. size. Photo, 

 of living animal by Dr. R. W. Shufeldt, " Bull. U. S. Fish Com.," 1899. 



