66 OTTO F. KAMPMEIER 
lym. jug. 
0 nephst. 
proneph. 
cor. lym. ant. 
proneph. 
Fig. 4 Same, at the level of the anterior limb bud (brach.).. X 50. lym. jug., 
lymphatica jugularis; proneph., pronephric tubules and sinusoids; JI nephst., 
2nd nephrostome; glom., pronephric glomerulus; int., intestinum; oesoph., oeso- 
phagus; ves. fel., vesica fellea; hep., hepar; coel., coelom. 
Fig. 5 Same, at the level of the 3rd spinal ganglia. X 50. cor. lym. ant., 
cor lymphaticum anterius; vent., venter. Other references as in the preceding 
figure. Lying medial to the pronephric tubules and sinusoids (proneph.) are, in 
the order named, the primary excretory duct, the subeardinal vein and the aorta. 
