324 THE WORLD OF THE SEA. 
they will eat the junior members of their own family. They 
swallow their prey without mastication, and frequently without 
even biting it. A bull-head has been known to swallow a young 
mullet, one and a half times as long as himself! John Barrow 
reports that a dog-fish harpooned near Java had in its stomach 
a number of bones which belonged to the head of a buffalo and 
a calf, as well as fragments of a large tortoise. Briinnich, when 
FATHER LASHER—THE MARINE BULL-HEAD. 
(Cottus bubalis.\ 
studying fish at Marseilles, found a dog-fish in whose stomach 
were two tunnies and a sailor dressed in all his clothes. Tales even 
more remarkable than these are told, but we fear to trespass upon 
the credibility of our readers. However, every book of travels 
contains accounts of the ferocity of sharks, and how that many a 
poor sailor has met his end from these marauders of the sea, 
which generally follow in the wake of the ship. 
Fish not only have their teeth set upon their jaws, but fre- 
quently the roof of the mouth is also covered. The mammalia 
