. The American journal of anatomy. stcaval veins were incompletely fused caudal to the internalspermatic veins. Under Types T and III. A, in wliieli the postcava is formed either 400 Acnons System of Didelphys Marsupialis entirely or for the most part by vessels wliieli unite ventral to the eomnumiliac arteries, only four cases were met with in which it was bifur-cated or presented indications of an incomplete fusion. It appears from the above statistics that we have grounds for assumingthat the presence of a double postcava in the adult Didelphys is in someway related to the manner in which t
. The American journal of anatomy. stcaval veins were incompletely fused caudal to the internalspermatic veins. Under Types T and III. A, in wliieli the postcava is formed either 400 Acnons System of Didelphys Marsupialis entirely or for the most part by vessels wliieli unite ventral to the eomnumiliac arteries, only four cases were met with in which it was bifur-cated or presented indications of an incomplete fusion. It appears from the above statistics that we have grounds for assumingthat the presence of a double postcava in the adult Didelphys is in someway related to the manner in which the internal iliac veins unite with theexternal iliacs to form the postcava, since ninety per cent (90^) of theobserved cases in which the postcava was bifurcated or presented indi-cations of a previous bifurcation, occurred under Types II, III, B, andIII, C, in which the anastomosis between the iliac veins ventral to theiliac arteries is either wanting, or does not exceed in size thatwhich is situated dorsal to the iliac
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectanatomy, bookyear1901
