416 



JOHN LEWIS BREMER 



PLATE 1 



Fig. 11 Model; human fetus of seven months. Two tubules of the testis with their 

 connections. The tubules are colored red and yellow, (tubules A and B). Cross 

 connections between them, of which there are two, are colored two shades of orange 

 and represent the outer and middle sets. From the outer cross connection come 

 two branches, one anastomosing with other tubules, not modeled, the other ending 

 blindly at x. From the other cross connection there is also an anastomosing 

 branch, a; while other branches from tubule B, which should be considered as be- 

 longing to the middle set, are seen at b and c. The inner set of cross connections 

 is represented by branches y and z, of which y ends blindlj-. Tubule B joins an- 

 other before meeting the rete tubule (fig. 5) while two rete tubules connect with 

 tubule A. The group of tubules in yellow, between the middle set of cross con- 

 nections and the periphery, form a unit; a single artei-y supplies them, and a 

 network of veins surrounds them, lying partly between them and the tubules 

 in orange. At r a ring is seen in the course of tubule .1. X 90 diam. 



12 



Fig. 12 Reconstruction; epididymis of human fetus of about 10 cm., age given at 

 106 days. The Wolffian duct is shown with fifteen Wolffian tubules ojjcning into it 

 one of which is traced to the rete (shown by the fine line), the others represented 

 as cut short. The upper end of the duct is probably the first tubule which has 

 failed to unite with the rete. The connections of all the tubules is shown in fig. 4. 

 X 40 diam. 



