SURVEY OF STRUCTURE 

 gg 



25 



Text-fig. 12. Swimbladders of Astronesthes lucifer (a and b) ; Borostomias antarcticus (c) and Astronesthes gemmifer (d). Lateral 

 views. In (c) two transverse sections of the swimbladder show the inner disposition of the gas-gland, ft, fatty investment 

 of swimbladder; gg, gas-gland; k, kidney; oy, ovary; psb, posterior end of swimbladder; ra, retial artery; rv, retial vein; 

 rm, rete mirabile ; sb, swimbladder. (a, x7"5; b, x i ; c, x 2; d, X4-8.) 



Astronesthes similis Parr 



Dana St. 939, 500-m. wire. B.M. Reg. no. 1929. 1.4. 81. Standard length 105 mm. (20x5 mm.). 



The swimbladder bauplan of this species is similar to that of other Astronesthes spp. The pointed 

 forward end of the sac, which is thin-walled, lies opposite the posterior edges of the gill covers. 

 There is a bilobed gas-gland immediately in front of the bulbous rete mirabile, which enters the 



