. The elasmobranch fishes . Fig. 189. Cutaneous veins, Heptanchus macidatus. (Helen Hopkins, orig.) , caudal vein; , cloacal vein; , lateral cutaneous vein; 77!.^;., median unpaired vein; , posterior dorsal cutaneous vein; , posterior ventral cutaneous; , sub- scapular vein. The ventral cutaneous vein lies in the subcutaneous tissue in the midventral line. In the region of the anal fin it forms a loop and like a V its right and left branches run backward on the caudal fin. The posterior part of the vessel empties into the cloacal vein (cLv.) and the anterior se


. The elasmobranch fishes . Fig. 189. Cutaneous veins, Heptanchus macidatus. (Helen Hopkins, orig.) , caudal vein; , cloacal vein; , lateral cutaneous vein; 77!.^;., median unpaired vein; , posterior dorsal cutaneous vein; , posterior ventral cutaneous; , sub- scapular vein. The ventral cutaneous vein lies in the subcutaneous tissue in the midventral line. In the region of the anal fin it forms a loop and like a V its right and left branches run backward on the caudal fin. The posterior part of the vessel empties into the cloacal vein (cLv.) and the anterior segment of this vein joins the coracoid vein (, fig. 187).


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