2 SMITHSONIAN IVIISCELLANEOUS COLLECTIONS VOL. 8/ 



and internal articular ])rocess relatively slight ; other characters of 

 skull, particularly the form of the cranium, masked hy crushing. 



Sternum represented hy anterior [)ortion of body only ; light in 

 weight and evidently pneumatic ; costal margin on left side fairly well 

 preserved and on the right less so : six costal processes indicated, 

 with intervening spaces containing pneumatic openings ; manubrium 

 broken away. 



Left articular end of furculum (remainder of bone missing) nar- 

 row and elongated, dithering from the heavier, broader form of living 



Fig. I. — ^Skull of Palaeoplaiicus stcrnbcrgi, natural size. The. 

 cranial portion, shown by dotted lines, is crushed and distorted 

 in the specimen. 



Fig. 2. — Lateral view of left side of furculum of Palaeoplanciis 

 stcrnherqi, natural size. 



hawks and eagles (fig. 2) ; coracoidal attachment strongly developed, 

 extending transversely across bone, projecting outward as a sharp 

 ridge ; scapular end elongated and pointed ; bone evidently pneumatic. 

 Right humerus (somewhat crushed but nearly complete) strong, 

 with well indicated sigmoid fiexure of shaft (figs. 3-4) ; agreeing in 

 general a])pearance with humerus in large species of Biitco, but with 

 ectepicondylar process somewhat reduced ; condyles of distal end 

 moderate in size, somewhat distorted by crushing, so that their 

 form in detail is not clearly evident ; deltoid crest strong and well 

 developed; upper end of shaft angularly ridged above line of attach- 

 ment of latissimus dorsi ; head somewhat slender, with characters 

 partly lost by crushing. 



