DEVELOPMENT OF LYMPHATICS IN ANURA 107 
Fig. 27 Diagrams (1 to 7) illustrating the formation of the afferent and effer- 
ent ostia of the lymph heart (based on transverse sections). v., vein; h., lymph 
heart; v. l., venolymphatic, a channel of the intersegmental vein plexus, and 
converted into the afferent lymph vessel, J. 
