SMITHSONIAN CONTRIBUTIONS TO KNOWLEDGF. 



VOL. 27, NO. 3, PL. 67 



f 

 I 



26 " Mn - 

 25 """ 



L^ 



^zz^; 



? * 



SECTION AT POINT OF 



CLAMPING 

 D 



-li" 



SECTION MIDWAY 

 OF LENC\TH 



E 



Fiq.2 



SECTION AT POINT OF 

 CLAMPINQ 



SECTION MIDWAY 

 OF LENGTH 

 B 



FIG. 1 



nr 



SECTION AT POINT OF CLftMPING,. 

 FIVE. TIMES ENLATJG.ED 



SECTION MIDWAY OF 

 LENGTH . FIVE. 

 TIMES ENLARQED 

 B' 



~Uc 



SECTION AT TIP 



F 



SECTION AT TIP 



SECTION (\T TIP. 

 FIVE. TIMES 

 ENLARGED 



c' 



FIG. 1 



CROSS SECTION OF RIBS 



