DOLPHIN’S AND PORPOISES. 
91 
teeth of any Mammal, sometimes as many as 60 on each side 
of each jaw, or 240 in all. Of the latter species a coloured 
model is also exhibited. 
The Delpliinidcc form a numerons group, including the species 
commonly called Dolphins and Porpoises, although some of 
the larger members are also dignified by the name of Whales. 
Skeletons of some of the species are exhibited, and models of 
others; and a series of casts of heads is affixed to the walls. 
Among the more interesting forms, reference may he made 
Fig. m. 
The Porpoise [Fhoccemi communis). 
Fig. 53. 
Skull of the Porpoise. 
to the true Dolphins [Del]?liimis)., which are found in con- 
siderable abundance in all seas, and are some of the smaller 
members of the order, none exceeding 10 feet in length. Their 
food is chiefly fish, for the capture of which their long pointed 
beaks, armed with numerous sharp teeth, are well adapted ; but 
some also devour crustaceans and shell-fish. They are mostly 
sociable, and the agility and grace of their movements are 
constant themes of admiration. The name Delphinus is 
restricted to the Dolphin of the Mediterranean, D. delplus, and 
