322 THE VIVARIUM. 
almost expects to see him burst. He follows his tormentors about 
with slow awkward leaps, his vast mouth wide open, and uttering 
an incessant, harsh, croaking sound. A gaucho I knew was once 
bitten by one. He sat down on the grass, and dropping his hand 
at his side, had it seized, and only freed himself by using his 
hunting-knife to force the creature’s mouth open. He washed 
and bandaged the wound, and no bad result followed; but when 
the Toad cannot be shaken off, then the result is different. One 
summer two horses were found dead-on the plain near my home. 
One, while lying down, had been seized by a fold in the skin near 
the belly ; the other had been grasped by the nose while cropping 
grass. In both instances the vicious Toad was found dead, with 
jaws tightly closed, still hanging to the dead horse. Perhaps 
they are sometimes incapable of letting go at will, and, like honey 
bees, destroy themselves in these savage attacks.”’ 
Mr. W. H. Hudsen also says that the Ceratophrys’ powerful 
voice may be heard distinctly, on still evenings, a mile off. Their 
cry he likens to the notes of some wind instrument, and the 
sound, he considers, not unmelodious. 
The Ceratophrys, when in captivity, should not be kept in a 
temperature lower than 65deg. Fahr. Like other Frogs they con- 
eregate in pools during the breeding seasons; but I am sorry to 
say that I believe little or nothing is known concerning their 
mode of propagation, and the life and metamorphosis of their 
larve. I am hoping to persuade them some day to breed while 
in captivity. 
Fine healthy specimens of these interesting Frogs may occa- 
sionally be bought for about £1 or £1 10s. each. ; 
The Horned Ceratophrys (C. cornuta) has, like all its genus, a 
heart-shaped tongue free behind. It possesses two small groups 
of vom:erine teeth, an exceedingly large and elevated head, a 
broad ridge running from the eye to above the tympanum (which 
is distinct), a nostril which is nearer to the small eye than the 
end of the nose, and a large horn-like protuberance above the 
eye. The upper surfaces of this creature’s body are covered with 
small tubercles ; the lower parts are granular. The following is 
Mr. Boulenger’s description of the colour of this animal : “ Greyish 
above, the median part of the back lighter ; head with symme- 
