ect pi. 



ect pi. 



p. ect - 



Fig. 10 Two egg cylinders of the albino rat found within the same decidual 

 crypt, with in part common ectoplacental cone. X 150. Rat No. 87, 9 days 

 after the beginning of insemination, ect.pl., ectoplacental cone or Trjiger; 

 p. ect., parietal or transitory ectoderm; v.ent., visceral entoderm; ex.ect., extra- 

 embryonic ectoderm; pr.c., proamniotic cavity; pr.emb.ect., primary embryonic 

 ectoderm; pr.emb.ent., primary embryonic entoderm; mes., mesoderm. 



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