gall bladder 



liver_ 



postcavo- 



bladder 



nephric duct 



''U(''r^ "^urogenital 

 V ' papilla 



anus to left of midline 



-fatty tissue of progonial port 



membranous surface of ovary, 

 mesovarium 



-kidney 



central canal of 



efferent ducts (recurrent ducts to 



nephric tubules) 



-mesentery 



.fused area of kidney 

 ^lymphoid part of kidne 



— cloocal aperture 



(on left side of fin) 



Mijilerian duct 



egg-bearing surface 

 of ovary 



epigonial part 



phric duct 



ubule draining kidney 

 (ductus epididymidis) 



al Mullerion ducts (dashed line) 



n papilla 



Figure 10-41. Urogenital system of lungfishes. A, ventral viev/ of Profopterus with gut removed; 

 B, details of tubule relationship of posterior end of A; C, sagittal view of cloocal region of A; D, 

 female system of Neocerafodus. (B, after Kendahl, 1938; D, after Gunther, 1871) 



riorly and posteriorly, and triangular in section. The right 

 testis is attached to the tip of the liver. The testis of either 

 side is supported by a short mesorchium, its posterior half 

 lying below the anterior half of the kidney. The seminiferous 

 ampullae are long, radially arranged, and open into a cen- 

 tral (dorsomedial) canal. Many efferent ducts extend from 

 the central canal into the kidney and connect with capsules 

 of the nephric tubules. The renal corpuscles of these tubules 



are retained and apparently remain functional as in the 

 other lungfishes. 



The Miillerian duct is present, lying along the broad, 

 dorsolateral surface of the testis. Posteriorly the Miillerian 

 duct passes below, then lateral to the nephric duct, and from 

 here to the midline where it fuses with that of the opposite 

 side. The common sinus thus formed ends blindly in front of 

 the cloaca. 



328 • THE UROGENITAL SYSTEM 



