14 CLASSIFICATION OF BIRDS. 
Order RAPTORES. 
The Raptores possess three characters which are not known to be combined in any other 
birds :— 
A. Young born helpless, but covered with down. B. Hallux always present, and con- 
nected with the flexor longus hallucis, and not with the flevor perforans digitorum. 
C. Spinal feather-tract well detined on the neck. 













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The admission or rejection of the Striges into the Raptores has been a vexed question for 
some time. Fiirbringer places the Striges in his Coraciiformes, next to the Podargide. In 
the following table some of the characters are compared, the relation of the Striges to the 
Podargide on the one hand and to the Accipitres on the other being expressed :— 
Podargide. Accipitres. 
differ maxillo-palatines agree 
do. palatines do. 
do. basipterygoids do. 
do. plantars do. 
agree ambiens differ 
do, femoro-caudal agree 
do. accessory do. do. 
differ semitendinosus do 
do. accessory do. do. 
agree cxca do. 
differ oil-gland differ 
