228 FISHES 



C'LASSIFICATIOX OF THE EXAMPLES 



Class — Pisces. 



Subclass — Elasmobraiichii. 



Order — Selaehii. 



Tyjies of Order. 



Sphyrna zygcena — Hammer-headed shark. 



Raja erinacea — Ray. 



C archarhinus glaucus — Blue shark. 



Trygon sabina — Sting ray. 



Torpedo occidentalis — Electric ray. 



Pristis pectinatus — - Sawfish. 



Subclass — • Teleostomi. 



Order — Choiidrostei. 



Types of Order. 



Acipenscr sturio ^ ,, 



. . 1 • 7 f Stureeons. 



Acipenscr rubicundus 1 



Scaphirhynchiis platyrhyiich us — Shovel-nosed 



sturgeon. 



Order — Holostei. 



Type of Order. 



Lcpidosleus osseus — Gar pike. 



Order — Teleostei. 



Types of Order. 



Oncorhynchus tschawylscha — Chinook salmon. 



Gadus callarias — Cod. 



Clupea harengus — Herring. 



Scomber scotnbrus — Mackerel. 



AnguiUa chrysypa — Ivd. 



Cypsilurus califorujcus — California flying fish 



Pcrca flavcsccns — Perch. 



Subclass — Dipnoi. 



Order — Monopncumona. 



Type of Order. 



Ceratodus Jorslcri — Lung fish. 



Order — Dipneumona. 



Types of Order. 



Proloptcrus anncclois ^ 



J ■ , ■ , ; Ijung fishes. 



Lcpiaosircn paradoxa. ' 



