382 MINOT. (VoL. II. 
Ar All 
Cut 4.—Two sections of umbilical cord. A, at sixty days; B, at three months; 
V, vein; Ar, artery; Ad/, allantois cavity; Coe, celom; Y, yolk sack; X 22 diams. 
and its entodermic cavity entirely obliterated. Near the em- 
bryo the ccelom may become much enlarged, and is often found 
during the second month and even later to contain a few coils 
of the intestine, as has been long known. Above the body cav- * 
Cut 5.— Connective tissue of the umbilical cord of an embryo of 21™™; x 540 
diams., stained with alum-cochineal, and eosine. 
