CHARACTERISTICS OF MARINE FISHES 



161 



(Courtesy U. S. Fish and Wildlife Service) 



Fig, 10-18. Barndoor skate {Raja laevis). 



(Courtesy U. S. Fish and Wildlife Service) 



Fig. 10-19. Sketch of the mouth of the shovehiose sturgeon 

 (Scaphirhynchus platorynchus) . 



