PLATE 3 



EXPLANATION OF FIGURES 



12 Drawn from a cleared preparation (internal view) of an albino rat seven 

 weeks old (weight 75 grams) to show distribution and relations of ducts of left 

 abdominal gland, first inguinal gland, and second inguinal gland. X 5. A.n., 

 abdominal nipple; Im.I, I.n.2, 1st and 2d inguinal nipples; L, lymph-node; p.d., 

 primary duct; s.d., secondary duct; t.d., tertiary duct; c, collateral duct; tr.d., 

 terminal duct; e.h., end-bud. 



13 Same as figure 12, but from an albino rat nine weeks old. (Weight 114.5 

 grams.) X 5. 



384 



