P.Z.S. 1874. PI. XVII. 



The femoro -caudal is denoted by A 

 the accessary femora -caudal by B 

 (he semctendoumus bv X 



llic accessory semztendznosus by Y 

 The absence of any of these is indicated 

 by the absence from the formula, of 

 its representative letter: 



AXY 



.- Passeres 



Iralbuhl 



Pela 



Pi c in a- 

 Dicrurus 



I'raaalha 



Trogonidse 

 Alcedinidse 



Cathait ii|;i' 

 Fhfctltcn 



C a prinralgidaB 



tn-iifudiv 



^ flion e 



'-■ Herodiones 

 Cancrornu 



C atnartidae 



XV 



Steatornitliidse 



BIUL/E OF BIRDS 



Eaw?"W T aier 



