54 



cal sections of the mass of tissue show the appearance which 

 is represented in the micro-photograph. It will be seen that renal 

 tubules are present but have not been completely differentiated. 

 A few glomeruli are also present. The interest of the case lies in 

 the fact that it completes the series of instances of unilateral renal 

 aplasia recorded some years ago by Dr. Craven Moore (1. '2). That 

 the important points ma^^ be more readily appreciated, it will be 

 convenient to tabulate the cases as they are recorded in the volume 

 of "Studies" and to add to them the present instance. 



Case I (Studies). Male: 

 Eight Side: 



Supra-renal, kidney, and renal vessels absent. 



Ureter present as small cul-de-sac in the bladder wall. 



Left side: 



Supra-renal capsule normal in size and position. 



Kidney, ureter and renal vessels larger than normal. 



Genital apparatus on both sides anatomically normal throughout. 



Present instance. Male: 

 Right side: 



Supra-renal normal in size and position. 



Kidney lobulated and greatly enlarged, with renal vessels and 

 ureter in proportion. 



Left side: 



Supra-renal normal in size and position. 



Kidney represented b}^ mass of connective-tissue containing 



renal tubules and a few glomeruli. 

 Ureter jjresent as fibrous cord, except near the bladder where it 



remained a patent tube. 

 Genital apparatus on both sides anatomically normal. 



Case II (Studies). Male. 

 Right side: 



Supra-renal, renal vessels and ureter, normal in form and relations. 

 Kidney much enlarged and lobulated. 



