STUEGEONS AXD SHAEKS. 
37 
The eastern or left side of the room is devoted to the exhibi- 
tion of a very different types of fishes, which were much more 
nnmerously represented in ancient times than at present. The 
majority have a cartilaginous skeleton. Among these former may 
be mentioned the Bichir of the tropical African rivers, the 
Fig. 8. — Rough Si x-fish. CArxuRED near Portland. 
Gar-Pike of ISTorth America (case 28), the Lung-Fishes {Dipnoi) 
of South America, Africa, and Australia (case 28), the Sturgeons 
(case 29), and finally the Sharks and Eays. The latter include 
the singular Hammer-headed Shark, and the Saw-Fish (Pristis), 
wliich has a long projecting flattened snout, with a row of teeth 
