miscellaneous: tumors in absence of parasites 493 



Fig. 370. — Same series as Fig. 369, but tumor D and from the middle level 

 of the leaf. In the center compact tumor tissue, surrounded by normal vessels 

 and loose mesophyll of leaf. Slide 1336D3. Top row, 2d section from left. 

 8 mm. obj., 4 oc, bellows at 45. Photomicrograph by the writer. 



