PLATE 5 



EXPLANATION OF FIGURES 



24 Human embryo, 20 mm. in length, 462 — 15 — 1 — 1X335. Section cutting 

 maxillary nerve (M) transversely at level of sphenopalatine ganglion (f<pg), 

 showing maxillary ramus (mr) into the latter. 



25 Human embrj'o, 20 mm. in length, 462 — 15 — 1 — 1X160. Section showing 

 maxillary ramus (mr) and nerve of the pterygoid canal entering sphenopalatine 

 ganglion (spg). GSP, nerve of the pterygoid canal which includes the fibers of 

 the greater superficial petrosal nerve. 



26 Human embryo, 21 mm. in length, 460 — 16 — 2 — 2X130. Section showing 

 maxillary ramus (mr) and nerve of the petrygoid canal (CSP) entering spheno- 

 palatine ganglion. 



224 



