FIG. 18. Anatomical plate. (After Shufeldt.) 



i, skeleton of typical passerine bird, the White-rumped Shrike (Lanius ludovicianus excubitorides); 2, pelvis of 

 young Sage Grouse (Centrocercus urophasianus); x, ilium; y, ischium; 2, pubis; 3, anterior view of right femur of Sage 

 Grouse; 4, anterior view of right tibia and fibula of adult Sage Grouse; 5, tarsometatarsus of adult Sage Grouse; 

 6, thoracic and pelvic bones with scapular arch of White-tailed Ptarmigan (Lagopus leucurus) ; 7, foot of young Sage 

 Grouse showing free centrale and indications of the three component tarsals. 22 



