352 



RICHARD E, SCAMMON 



Y. w. 



Hep.d. 



hep, p. 



Figs. 9, 10, 11, 12 A series of semi-schematic reconstructions to illustrate the 

 early development of the liver; all X 50. The plan of reconstruction is explained 

 in the text on p. 350. F.g., fore gut; G.hl., gall bladder; Lal.hep.p., lateral hepatic 

 pouches; Med. hep. p., median hepatic pouch; Hep.d., hepatic diverticula; P. di(c<. 

 lat., pars ductus lateralis; Sp.v., spiral valve; Y.w., anterior wall of the yolk 

 stalk. 



Fig. 9 Embryo 3.6 mm. long. 



Fig. 10 Embryo 6.4 mm. long. 



Fig. 11 Embryo 9 mm. long. 



