210 Mr. F. E. Beddard on the Anatomy 



that nearly reaches the jugal. The '' os uncinatum " is well 

 developed and nearly reaches the palatine. The squamosal 

 has a much longer forwardly directed process than in Eudy- 

 namis, in this character approaching Scythrops, which does 

 not, however, as I interpret its structure, belong to the same 

 subfamily of Cuckoos. 



Fig. 24. 



Skull of Pyrrhocentor celebensis (nat. size), ventral aspect. 



One of the most salient points of difference which dis- 

 tinguishes the various genera of Cuckoos concerns the form of 

 the palatines. Phomicophaes and Rhinococcyx (fig. 26, p. 212) 

 (which are really hardly separable generically) stand midway 

 structurally, if not phylogenetically, between Carpococcyx 

 and Eudynamis ; the palatine ridges come into contact for a 

 very short space posteriorly. It may be observed also that 

 the rudiments of basipterygoid processes are fairly marked, 

 but the pterygoids are not bowed inwards. 



Scythrops, as the accompanying figure (fig. 25, p. 211) 

 shows, has been developed from some such ground-form as 

 Eudynamis in the opposite direction. In the last-named 

 genus the palatine ridges are bent away from each other, 



