. The American journal of anatomy. Fig. X. Fig. XI. Fig. X. Postcava of Echidna embryo No. 44. Ventral view. After Hocbstetter. Fig. XI. Postcava of Echidna embryo No. 45. Ventral view. After Hocbstetter. , A. iliaca externa; , A. iliaca interna; , A. mesenterica anterior;, A. mesenterica posterior; Ao., Aorta; , A. ompbalomesenterica; ,V. iliaca externa; , V. iliaca interna; , V. suprarenalis. If this relationship can be definitely established for Didelphys, throughfurther investigation, it would seem to account for the presence of thebifurcated p
. The American journal of anatomy. Fig. X. Fig. XI. Fig. X. Postcava of Echidna embryo No. 44. Ventral view. After Hocbstetter. Fig. XI. Postcava of Echidna embryo No. 45. Ventral view. After Hocbstetter. , A. iliaca externa; , A. iliaca interna; , A. mesenterica anterior;, A. mesenterica posterior; Ao., Aorta; , A. ompbalomesenterica; ,V. iliaca externa; , V. iliaca interna; , V. suprarenalis. If this relationship can be definitely established for Didelphys, throughfurther investigation, it would seem to account for the presence of thebifurcated postcava in the adult of Echidna aculeata, since this conditionin Echidna is reached through exactly the same venous transformationsas those which have apparently produced the bifurcated condition inDidelphys, as can be seen from the following brief account of the devel-opment of the postcava in Echidna. Hocbstetter, 96, who has studied the development of the postcavalvein in Echidna aculeata, finds that, at an early stage, it cons
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectanatomy, bookyear1901
