Morphological Studies. 783 



Fig. 21. Transverse section of a Torpedo embryo, showing similar 



appearances to those seen in fig. 19. Also shows the limits of the 



olfactory epithelium. Zeiss D. oc. 2. 

 Pig. 22. Shows the whole section from which the preceding figure was 



taken. The enclosed figure shows the portion depicted in fig. 24. 



Zeiss A. oc. 2. 

 Fig. 23. Longitudinal vertical section of the anterior part of the head 



of a young Anguis embryo, showing the neuro-epithelium giving 



rise to Jacobson's organ (Jo) and the nose proper {n). Zeiss C. 



oc. 2. X 145. 

 Fig. 24. Section of a Torpedo embryo to show the epiblastic foundation 



of the olfactory neural-ganglion (ol a n). Zeiss F. oc. 2. 



