II COS rENTS. 



PAG] 



VII. Comparative morphology of primary lymph sacs, lymph hearts, 



lymph glands and amphibian lymph aaca 7u 



VIII. Various other tln-nrles in regard to the origin and development 



of the lymphatic system 72 



1. Mayer-Lewifl Anlagen 72 



2. Kxtra intimal and perineural spaces and fenestration 75 



Growth of lymphatics by the addition of tissue spares 77 



IX. Conclusions B2 



x. Literature B8 



