The elasmobranch fishes (1934) The elasmobranch fishes elasmobranchfish03dani Year: 1934 THE ELASMOBRANCH FISHES 203 part. The posterior part is first found al)out halfway between the pectoral and pelvic segments and continues from this point posteriorly almost to the tip of the tail. In the region of the dorsal lobe of the caudal fin the dorsal cutaneous vein is double, and around the dorsal fin right and left dorsal cutaneous veins form a loop from which a strong intercommunicating branch passes to join the lateral cutaneous vein. From the unpaired vein just back of the loop a medium Fig
The elasmobranch fishes (1934) The elasmobranch fishes elasmobranchfish03dani Year: 1934 THE ELASMOBRANCH FISHES 203 part. The posterior part is first found al)out halfway between the pectoral and pelvic segments and continues from this point posteriorly almost to the tip of the tail. In the region of the dorsal lobe of the caudal fin the dorsal cutaneous vein is double, and around the dorsal fin right and left dorsal cutaneous veins form a loop from which a strong intercommunicating branch passes to join the lateral cutaneous vein. From the unpaired vein just back of the loop a medium Fig. 188. Sinus venosus opened, Heptanchus maculattis. (Euth Jeanette Powell, del.) , anterior cardinal; au., auricle; , hepatic vein; , inferior jugular vein; , postcardinal sinus; sa., sinu-auricular valve; , subclavian vein; , sinus venosus; v., valves of anterior cardinal sinus. deep vein () passes to the right of the spinal column to join the caudal vein (). The anterior part of the dorsal cutaneous vein ends anteriorly in a V-shaped sinus over the brain case. The lateral cutaneous vein (Lev., fig. 189) runs directly under the skin, parallel with and ventral to the lateral line groove. It extends from the middle region of the caudal fin forward, and joins the subscapular sinus near its tip (fig. 187). In its course forward it receives numerous segmentally arranged cutaneous branches, and in the region of the dorsal fin it has strong intercom- municating branches which join the cloacal vein () of the lateral ab- dominal system.
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