Discovery reports (1962) Discovery reports discoveryreports31inst Year: 1962 16 DISCOVERY REPORTS having a length of at least 5 mm. After taking a twisting course through loose connective tissues, the rete enters a heart-shaped gas-gland set in the anterior floor of the bladder. This gas-gland is re- latively large, with a length of 1-4 mm. and a width of 1-3 mm. and with the glandular tissue arranged in numerous lacunae. The swimbladder has thick walls consisting mainly of loosely woven connective tissues formed within a viscid matrix. There was no investment of fat and this is unlikely to
Discovery reports (1962) Discovery reports discoveryreports31inst Year: 1962 16 DISCOVERY REPORTS having a length of at least 5 mm. After taking a twisting course through loose connective tissues, the rete enters a heart-shaped gas-gland set in the anterior floor of the bladder. This gas-gland is re- latively large, with a length of 1-4 mm. and a width of 1-3 mm. and with the glandular tissue arranged in numerous lacunae. The swimbladder has thick walls consisting mainly of loosely woven connective tissues formed within a viscid matrix. There was no investment of fat and this is unlikely to have disappeared through leaching action, for the fish was preserved in formalin. However, Dr Aughtry, who has studied the ecology of Cyclothone signata in the Monterey area, California, has written to me of his finding a fat-charged swimbladder in fishes from 27-0 to 35-0 mm. in standard length. Text-fig. 6. Swimbladder of Ichthyococcus ovatus, viewed from above. The three lobes of the gas-gland are on the floor of the sac. bpr, by-pass branch of retial artery; en, resorbent capillary network; gg, gas-gland; ra, retial artery; rv, retial vein; rm, rete mirabile. ( x 16.) Cyclothone braueri Jespersen & Taning (Text-fig. 8) St. 287, 2° 49' 30' S., 90 25' 30' W., 19. viii. 27, TYF, 85o(-o) m. Standard lengths of two individuals examined, 33 and 31 mm. St. 3094, 440 20' N., 160 49' W., 21. v. 54, TYFH, isoo(-o) m. Standard length 26-5 mm. The swimbladder lies well back in the body cavity, the posterior end being above the base of the pelvic fins and immediately in front of the bulbous part of the kidneys. In the 31-mm. fish the organ
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