100 



FISH GALLERY. 



[Case 30. J resembles that of the Dipnoids. In fact this Suborder connects 

 the Ganoids with the Plagiostomes. It contains one family only, 

 represented in the living fauna by two genera — Chimeera and 

 Callorhynckus. Of the former three species are known — Ch. mon- 

 strosa, from the coasts of Europe and Japan and the Cape of Good 



Pig. 90. 



Egg of a Dog-fish (Scyttium). (From Magelhan Straits.) 



Hope; Ch. cottiei, from the west coast of North America; and 

 Ch. affinis, from the coast of Portugal. Callorhynckus antarciicus 

 i- common in the southern temperate zone, and differs from the 

 preceding by the curious shape of the snout, which bears a 

 cartilaginous prominence terminating in a cutaneous flap. 



Plagiostomata, or Sharks and Rays. 



These have from five to seven gill-openings and the teeth are 

 numerous. They differ greatly among each other with regard to 



