SURVEY OF STRUCTURE 17 



is 3 mm. in length and is invested with reticular connective tissue charged with fat droplets. Two 

 blood-vessels, which are closely bound together, enter the posterior under-surface and run forward 

 to a spherical whitish body set in the middle of the fatty tissue. This body has a diameter of 0-6 mm. 

 and within it are the regressed gas-gland and capillaries of the rete mirabile, these being enveloped 

 by a fibrous coat and bound together with more diffuse connective tissues. 



st 



rsb 



ft 



mt 



oy 



bk 



rm 



Text-fig. 7. Fat-invested swimbladders of Cyclothone microdon (a and b) and C. signata (c, D and e). (a and c, lateral views ; 

 D and E, ventral views.) bk, bulbous, posterior part of kidney; gg, gas-gland ; ft, fatty investment of regressed swimbladder ; 

 mt, intestine; oy, ovary; pv, origin of pelvic fins; rm, rete mirabile; rsb, regressed swimbladder; st, stomach, (a, x 13-5; 



B . x 37-5; c . xi8"9; d, xi8-9; e, x 30.) 



3 DM 



