l'J>ATE 1:5 



PAUAPIIVSIS A\D PI.VEAL REGIOX IX IJEI'TIl.IA 



JOHN WAKREN 



PC E SC 



PVA 



EXPLANATION OF FIGURES 



38 Sheep, 26.1 mm. H. E. C, Sagittal series, no. 1112, section 222. X26 diams. 



39 Human embryo, 28.S mm. H. E. C, Sagittal series, no. 1598, section 289. 

 X 26 fliams. 



(392) 



