432 MALL. [VoL. XII. 
ventral median line, as shown both in the reconstruction and 
the sections (Figs. 30, 37-39). After the vein has moved 
around the body to its ventral surface, and after the liver 
moves away from the umbilicus up to the permanent diaphragm, 
it is easy to explain the formation of the round and broad liga- 



SS 


mie Si 
“7 


WN 
soy 
S 

WY 


SS SD \WAY 
<S 
ANS, 
Fic. 30. — Reconstruction of Embryo No. II. Enlarged 17 times. V and _X, fifth and tenth cranial 
nerves; 7, 2, 3, and 4, cast of the branchial pockets; 7 and 8, first and eighth cervical nerves, 
from the fourth the phrenic arises; 72, twelfth dorsal nerve; A, auricle; V7, ventricle; Z, 
lung ; S, stomach; P, pancreas ; W” D, Wolffian body ; X, kidney; 17, mesentery ; S 7, septum 
transversum ; O, openings which communicate with the peritoneal cavity of the opposite side. 
The black line around the heart marks the pericardial cavity. 
ments of the liver as a secondary formation, but not as a rem- 
nant of a ventral mesentery. It might be called a portion of 
the septum transversum, as it is directly continuous withit. A 
ventral mesentery does exist between the abdominal walls 
and the liver, and only extends slightly below the liver. It is 
