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THE POPULAR SCIENCE MONTHLY. 



to do this, when Muster " Guy Fuwkes " suddenly reappeared, shaking 

 liis funny little horsedike ears, from the bottom of his tank, with a 

 hippopotamic grin on his face, as much as to say, "Don't be fright- 

 ened, I am all right; you don't know all about me yet ! " The little 

 beast had remained, without blowing or taking breath, actually under 

 water for nearly twenty minutes. The parents have never been known 

 to be under much over three minutes. I suspect Nature has given this 



