PLATE 6 



EXPLANATION OF FIGURES 



27 Human embryo, 20 mm. in length, 4(i2 — 14 — 2 — 3X335. Section through 

 mandibular nerve (Man) and ramus {Mnr) to otic ganglion (OG). 



28 Human embryo, 21 mm. in length, 460 — 16 — 1 — 2X160. Section cutting 

 mandibular nerve (Man) transversely at level of otic ganglion {OG). 



226 



