CHAP, xx.] FISHES. 429 



FAMILY 13. POLYNEMID^E. (3 Genera, 23 Species.) 



" Marine or fresh-water fishes, with compressed oblong bodies 

 and entire or ciliated scales." 



DISTRIBUTION. Tropical seas and rivers of both the great 

 oceans, but most abundant in the Pacific. 



FAMILY 14. SPHYRENID.E. (1 Genus, 15 Species.) 



"Carnivorous marine fishes, with elongate sub-cylindrical 

 bodies covered with small cycloid scales." 



DISTRIBUTION. The warm and tropical seas of the globe. 



FAMILY 15. TRICHIUBIDJE. (7 Genera, 18 Species.) 



" Marine fishes, with elongate compressed bodies covered with 

 minute scales or naked." 



DISTRIBUTION. All the tropical and sub-tropical seas. 



FAMILY 16. SCOMBRID^E. (20 Genera, 108 Species.) 



" Marine fishes, with elongate compressed bodies, scaled or 

 naked." 



DISTRIBUTION. All the temperate and tropical oceans. Mostly 

 inhabiting the open seas. 



Scomber^ (the Mackerel), Tkynnus, Naucrates, Zeus, Centro- 

 lopkus, Brama, and Lampris, are genera which have occurred in 

 the British seas. 



FAMILY 17. CARANGIDJS. (27 Genera, 171 Species.) 



" Marine fishes, with compressed oblong or elevated bodies 

 covered with small scales or naked." 



DISTRIBUTION. All temperate and tropical seas ; some species 

 occur in both the great oceans, ranging from New York to Aus- 

 tralia. 



Trachurus and Capros are genera which occur in British seas. 



