314 A COURSE ON ZOOLOGY. 



The flying-fish of the Gulf of Mexico and the tropical 

 Atlantic is the flying-gurnard ; its pectoral fins are so 



FIG. 269. 



SAPPHIRINE GURNARD (Trigla hirundo). 

 FIG. 270. 



SWORD-FISH. 



largely developed that the fish can leave the water, con- 

 tinuing its course in the air for a distance as great as 

 five hundred yards. 



The sword-fish is remarkable for the extensive bony 



