PLATE XXXIV 



EXPLANATION OF FIGURES 



48 Reconstruction (after Born) of veins in the lumbar region of a 23-mm. cat 

 embryo. Lateral aspect, right side. Note presence of right side of renal collar 

 (Subc.Sprc.Anast.) and fusion between right and left supracardinal veins. Coll. 

 of P. and S. Embryological Collection, no. 569. 



49 Reconstruction (after Born) of veins in the lumbar region of a 23-mm. cat 

 embryo. Lateral aspect, left side. Note absence of left side of renal collar and 

 presence of left posterior cardinal vein (Pc.-D). In its present transition stage, 

 the vena cava is represented by Type BD (right supracardinal and left posterior 

 cardinal veins). Coll. of P. and S. Embryological Collection, no. 569. 



124 



