186 



DK. W, W. F, WOODLAND ON THIS 



the upper and lower sides of the ductus pueumaticus two distinct 

 masses of intermingled arteries and veins (fig, 3), each mass 

 having resulted from the subdivision of the two pairs of arteries 

 and reins, which, as we have seen, have themselves originated 



Text-fiff. 53. 



A- 



p.a- 



R.nr 



P.B: 



A.B. 



The bladder, duct, and "red bodies " of Anguilla vulgaris, 

 viewed from the side (after Quekett). 



P.D., pneumatic duct which opens anteriorly into the a?sophagus; A and V, artery 

 and vein supplying bladder; E.M., rete mirabilej A.B., anterior region of 

 bladder; P.B., posterior region of bladder. 



