SKELETON. 



431 



two bear ribs which reach the sternum and are clearly thoracic ; 

 these are followed by a variable number (about six) of vertebrae 



Fio. 239.— Skeleton of Xeyphron percnoptenis (from riaus). CC carous • r/ rlavirip • 

 ff ImmPnl^ ■' f,'*,i^f'^ri°>^/Piio!is processes of the thoracic v ertebra^ ; i^ ^b^la ; k femt ' 

 n humerus : Jl Uium ; Js ischium ; Mc metacarpus ; P\ P\ P'" phalanges of the fin opps ■ 

 Pb pubis ; Pu uncinate processes of the ribs ; JB racHus •\rA cervical rtbsSV seLn^f « 

 sternum ; Ste sternal portions of ribs ; T tibia ; rmtarso metatarsus ;^'u1na;/?^es. 



