The Skeleton of the Fish 59 



In the chimseras (Holocephali] the notochord persists and is 

 surrounded by a series of calcified rings. The palate with the 



FIG. 48. Shoulder-girdle of a Toadfish, Batrachoides pacifici (Giinther). 



suspensorium is coalesced with the skull, and the teeth are grown 

 together into bony plates. 



The Archipterygium. The Dipnoans, Crossopterygians, and 



FIG. 49. Shoulder-girdle of a Garfish, Tylosurus fodiator (Jordan and Gilbert). 



Ganoids represent various phases of transition from the ancient 

 cartilaginous types to the modern bony fishes. 



