Fig. 252. — Brachyrhinus . Sagittal section of three-day embryo, {am) Amnion, {ect) 

 Ectoderm. {U) Inner layer, {stom) Stomodaeum. (yc) Yolk cell. 



Fig. 253.— Brachyrhinus. Sagittal section of six-day embryo, {myct) Mycetom. {stom) 



Stomodaeum. 

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