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Discovery reports (1962) Discovery reports discoveryreports31inst Year: 1962 SURVEY OF STRUCTURE 4i Gymnoscopelus nicholsi (Gilbert) (Text-fig. 23) St. WS 213, 49°22'S., 6o°io'W., 30 v. 28, N 4-T, 249-259 m. Reg. no. 621-6. Standard length 50 mm. The swimbladder, which is found over the middle region of the stomach, measured no more than 2-5 mm. in length. As in all myctophids, three retia mirabilia, which are closely bound together, enter the anterior end of the swimbladder. The gas-gland is oval in outline and invests the floor of the swimbladder over its anterior half. The
Discovery reports (1962) Discovery reports discoveryreports31inst Year: 1962 SURVEY OF STRUCTURE 4i Gymnoscopelus nicholsi (Gilbert) (Text-fig. 23) St. WS 213, 49°22'S., 6o°io'W., 30 v. 28, N 4-T, 249-259 m. Reg. no. 621-6. Standard length 50 mm. The swimbladder, which is found over the middle region of the stomach, measured no more than 2-5 mm. in length. As in all myctophids, three retia mirabilia, which are closely bound together, enter the anterior end of the swimbladder. The gas-gland is oval in outline and invests the floor of the swimbladder over its anterior half. The walls of the bladder are so thick that little remains of the inner cavity. Clearly, the organ has undergone considerable regression. B
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