BONY FISHES. 



315 



prolongation of its upper jaw, called its sword, which it 

 uses as a weapon, and with which it can even pierce the 

 planking of ships. It has no teeth. 



Acanthopterygii pharyngognathi, The species of 

 wrass, among which is the parrot-fish, belong to this 

 order. They have strong, bony jaws, the teeth being 

 firmly united together. 



Fia. 271. 



CODFISH. 



Anacanthini. This order has no spinous rays in the 

 dorsal or ventral fins, and if an air-bladder be present 

 it has no duct. The 



family of codfishes FIG- 272. 



form the most im- 

 portant members, 

 constituting the 

 means of life and 

 the food of whole 

 cities and tribes on 



the North Atlantic SAND-EEL OR SAND-LANCE (Ammodytes lancea). 



coasts. Cod-liver oil 



is made from the livers of these fish. The haddock and 

 the hake belong to this family. The sand-eel, much 

 used as bait in sea-fishing, belongs to another family 

 of the same order. 



