-42- 



p.s, protuberance of secreted 



matter. 

 8. secretion, 

 sp.c, spinal cord. 

 sto. stomodaeum. 

 thy. thyroid gland. 

 t.m. tongue muscle, 

 u.l. upper lip, 

 V. velum. 



v.a, 1, 2, etc. Ist, 2nd, 

 etc. visceral arches. 



V.C-, visceral clefts. 



v.c.g. ventral ciliated 

 groove. 



x-y. line through which the 

 separation of the side 

 pouch from the ventral cili- 

 ated groove takes place. 



