PLATE XLV 



EXPLANATION OF FIGURES 



60 Marsupial Type of vena cava posterior. Vena cava posterior of Petrogale 

 (spec.?). After McClure, figure VI, '03. 



61 Adult cat (Darrach Series). Persistence of cardinal collateral channel 

 (C.C., fig. 1), in conjunction with right and left posterior cardinal veins. A 

 combination of Type AD and the Marsupial Type of vena cava. 



62 Adult cat (after McClure, fig. 4, '00). Persistence of cardinal collateral 

 channel (C.C.) and right supracardinal vein (Sprc.Dext., fig. 1). Princeton Mor- 

 phological Museum, no. 603. 



340 



