166 



ZOOLOGY. 



Following the flying-fish is the family represented by 

 the silver gar or bill-fish (Belone longirostrus Mitchill, 

 Fig. 21 J). 



The sucker (Echeneis remora Linn.) occurs along the 

 whole coast of the United States, and is found all over the 



Fig. 209.— The Large Chub, Semotilus rhotheus, one fifth natural size. From 



Abbot. 



tropical and subtropical seas. It is provided with a broad 

 oval sucker on the upper side of the head, by which it ad- 

 heres to other fish or even to ships, and may thus be trans- 

 ported long distances. Another noticeable member of the 



Fig. 210.— The Bill-fish, Belone longirostrus, one third natural size. 



order is the blue-fish (Pomafomus saltatrix, Fig. 211), 

 so valuable as a food-fish. 



The dolphin (Coryphwna) is sometimes found upon our 

 coast, but it is essentially a pelagic fish, i.e., occurring only 

 out of sight of land upon the high seas. The pilot-fish is 

 also a pelagic form. 



The percoid fishes are represented by the perch (Perca 

 flxiviatilis), which spawns in winter, making slight hollows 



