VITAL STAINING AND MOR PHOGE NET I C MOVEMENTS 



221 



SUCKER 



LENS 



NEURAL FOLD 

 EAR 



LIMIT OF HEAD REGION 



LIMIT OF INTURNED 

 MATERIAL 



VISCERAL POUCHES 

 ANTERIOR LIMB BUD 



LIP OF BL ASTOPORE 



LIP OF BLASTOPORE 



POSTERIOR- DORSAL VIEW 



RIGHT SIDE VIEW 



PRESUMPTIVE REGIONS OF ANURAN BLASTULA 



(ADAPTED FROM VOGT 1929) 



DORSAL 



MARGIN OF INM«31NATI0N 



SPLANCHNIC MESODERM 



ECTODERM 



REGION OF DORSAL UP 



VENTRAL 

 POSTERIOR (BLASTOPORIC) VIEW 



RIGHT SIDE VIEW 



PRESUMPTIVE REQONS OF URODELE BLASTULA 



(ADAPTED FROM VOGT ^ 1929) 



