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TRANSACTIONS OF THE AMERICAN PHILOSOPHICAL SOCIETY 



last traces of the myodome are retained as well as the basisphenoid (Starks, 1923, p. 282). 

 The skull top lacks the extreme specializations of either Uranoscopus or Astroscopus and 

 apparently could be ancestral to either. It shares with the former the contact of the 

 sphenotic with the parietal. The supraoccipital widely separates the opposite parietals, 



Crapatalus 



Dactylagnus 



Fig. 244. Daclylagnus, Crapatalus, Uranoscopus. Top views. After Starks. 



which have barely begun to overlap it. The very large orbits have raised orbital rims, 

 which leave between them a median fossa for the reception of the ascending processes of the 

 premaxillae. The condition here suggested is that the ancestral uranoscopoid was a fish 

 with broad, depressed head, dorsally-displaced large eyes and upturned, backwardly- 



