THE SALMON 23 



family (Clupeidce} ; the Haplomi^ containing the Pikes 

 (Esocidce] ; the Apodes, including the Eel family 

 (Anguillidce), and the Ostariophysi, wherein are placed 

 the families of the Carps (Cyprinidce) and the 

 Loaches (Cobitidce). 



These will now be treated of in the sequence in- 

 dicated, and will then be followed by the more 



FIG. 5. Caudal fin of a Trout, showing the upturned posterior 

 vertebrae and the rays supported by the hypurals or hoemal 

 spines (h). 

 c. centrum ; n. neural spine ; ep. epurals (supra-caudal basalia). 



specialized orders, terminating with those fishes 

 which have lost the pneumatic duct and have 

 developed spinous fin-rays, and in which the pelvic 

 fins have migrated forwards to a position below or in 

 advance of the pectorals. 



The Salmon and its allies (Salmonidcz} are perhaps 

 the most interesting of all the groups of fishes ; they 

 are of great economic value, and the sportsman will 



