ACCIPITRES 



483 



membranosus are inserted in common. There are two 

 peroneah (at any rate in Cathartes). The deep flexors are 

 fused before origin of four slips to four toes. 



The cjlutccus I. covers over biceps, and gluttmis V. is 

 present. 



The sTiidl of the Cathartidae has basipterygoid processes. 

 It is desmognathous, but the desmognathism is totally 



frnx 



FIG. 229. WINDPIPE OF CONDOK (AFTER 

 BEDDARD). 



FIG. 230. SKULL OF Cathartcs 

 aura (AFTER HUXLEY). 



Tr, trachea ; ce, oesophagus ; 0, ostia of lungs ; s, sp, Pmx, premaxilla : ^f.^p, ruaxillo-pala- 

 septa between air sacs ; in, muscles ensheathing end tines ; PI, palatines ; Pf, pterygoid ; 

 of bronchi. ,^ ossified septum ; .;, basipterygoid 



processes. 



different from that of other vultures and hawks. The 

 maxillo-palatines proper (see fig. 230) are very far indeed 

 from meeting in the middle line ; indeed, they only just get 

 beyond the shelter of the palatines. But a flat dorsal pro- 

 cess of each of these bones (S) meets and is co-ossified with 



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