SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 50. PL. XLVI 



MEA 



DSPV 



DFS 



MLC 



SAD 



SAS 



Figs. 3, 4, 5.— Transverse sections of neck of pigeon. Fig. 6.— Dorsal aspect 

 of pelvis. See page 412. 



