. The elasmobranch fishes . rig. 194. General view of veins of body. A. MuMelus antarcUcus. (From T. J. Parker.) B. Eaia erinacea. (From Rand.) , anterior cardinal sinus; , brachial vein; , caudal vein; , cloacal vein; , femoral vein; , inferior jugular vein; , iliac vein; , lateral abdominal vein; , postcardinal vein; , posteardinal sinus; , renal portal vein; , subscapular vein; , subclavian vein. form a fused vessel posteriorly (Scijllium and Raja). In others the postcardi- nals extend as separate vessels from the posterior

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. The elasmobranch fishes . rig. 194. General view of veins of body. A. MuMelus antarcUcus. (From T. J. Parker.) B. Eaia erinacea. (From Rand.) , anterior cardinal sinus; , brachial vein; , caudal vein; , cloacal vein; , femoral vein; , inferior jugular vein; , iliac vein; , lateral abdominal vein; , postcardinal vein; , posteardinal sinus; , renal portal vein; , subscapular vein; , subclavian vein. form a fused vessel posteriorly (Scijllium and Raja). In others the postcardi- nals extend as separate vessels from the posterior tip of the kidney behind to the sinus venosus in front. As a usual thing, liowever, only the right one ex- tends backward the whole length of the kidney, while the left is attached to the right {Mustelus, fig. 194a, ). In the sharks the anterior third of the posterior cardinals forms the enlarged

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