GREGORY: FISH SKULLS 



145 



A related family of Cretaceous clupeoids is the Ctenothrissidse (see p. 149 below), 

 which had already advanced in the direction of the spiny-finned fishes. "With these 

 specialized Clupeoids there are others," Smith Woodward continues, "of a more generalized 

 grade," including Crossognathus and Syllcemus. 



Clupeids. — The skulls of the modern Clupeidae- (Figs. 38-41), which have been so 



■meth- 



deth 



.-fr 



t/0 pfi^pareth 



B 



ahph '^° par epiot 



■meth 



.supclt 



Albula vulpes 



Fig. 37. A, B, D. Albula vulpes. C. Albula conorhynthus. After Ridewood. 



