The Skeleton of the Fish 



59 



In the chimasras {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, Tjjlosurus jndialnr (.Jordan and Gilbert). 



Ganoids represent various phases of transition from the ancient 

 cartilaginous types to the modern bony fishes. 



