Discovery reports (1962) Discovery reports discoveryreports31inst Year: 1962 42 DISCOVERY REPORTS No trace of a swimbladder was found in adults of the following species: Gonichthys coccoi (Cocco), Ctenobranchus nigro-ocellatus (Giinther), Diaphus coeruleiis Klunzinger, and Gymnoscopelus braueri (Lonnberg). Family Neoscopelidae Neoscopelus macrolepidotus Johnson (Text-fig. 24) John Murray Expedition St. 145, Maldive Area, 494 m. Reg. no. 475-84. Standard length 118 mm. (30-0 x io-o mm.). A capacious swimbladder with rounded anterior and tapering posterior extremities runs down
Discovery reports (1962) Discovery reports discoveryreports31inst Year: 1962 42 DISCOVERY REPORTS No trace of a swimbladder was found in adults of the following species: Gonichthys coccoi (Cocco), Ctenobranchus nigro-ocellatus (Giinther), Diaphus coeruleiis Klunzinger, and Gymnoscopelus braueri (Lonnberg). Family Neoscopelidae Neoscopelus macrolepidotus Johnson (Text-fig. 24) John Murray Expedition St. 145, Maldive Area, 494 m. Reg. no. 475-84. Standard length 118 mm. (30-0 x io-o mm.). A capacious swimbladder with rounded anterior and tapering posterior extremities runs down the greater part of the upper body-cavity. The lower half of the sac, which is rather thick walled, is invested with pigmented peritoneum. Text-fig. 24. Swimbladder of Neoscopelus macrolepidotus, seen (a) from below. In (b) is shown a single rete and lobe of the gas-gland, gg, gas-gland; rm, rete mirabile. (a, x 3-9; b, x 9-3.) The gas-gland covers some two-thirds of the floor of the sac and is fed by five massive retia mira- bilia. These originate from a blood-vessel junction, which is found on the right-hand side of the anterior under-surface of the swimbladder. The junction receives a large vein from the hepatic portal system and an artery from the system of vessels on the roof of the stomach. There is also a blood- vessel (probably an artery) running backwards to the junction from the forward end of the swim- bladder. But the fish is so poorly preserved that it is impossible to trace the blood-system with any certainty.
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