A NEW SPECIES OF MULBHRRY FUNGUS. 203 



Fiff. 3. Hypha3 of mycelial strands, showing the mode of 

 ramification. X440. 



Fig. 4. A kind of branching in a similar hyphn. x 440. 



Fig. 5. White hypha3 in the tissues of the host plant. 



X 440. 



Fig. 6. Crystalline spheres of calcium oxalate. xö. 



Fig. 7. A similar sphere much magnified. x240. 



Fig. 8. Wedge-shaped crystals B of the same ; A showino- 

 their radiating structure. x240. 



Fig. 9. Ma.sses of coloured mycelia a in the interstices of cork 

 layers b. x 10. 



Plate XXVII. 



Fig. 1. Portion of a diseased root, with numerous sclerotia a of 

 the fungus. Natural size. 



Fig. 2. Longitudinal section (jf the bark of a root, showing the 

 formation of sclerotia. x 5. 



Fig. 3. Vertical section of a Sclerotium; a, medulla; ^, rind ; 

 c, remains of hyphas. x50. 



Big. 4. Portion of the same, showing its tissues ; the letters 

 correispond to those in Fig. 3. x440. 



B'ig. 0. Hyphas in the medullary stratum of the pileus. 



x440. 

 Figs. 6', 7. Hypha^ in the hymenial layer of the pileus. 



x440. 

 Figs. 8, 9, 10. Basidia with sterigmata and young spores. 



X440. 

 Fi(j. 11. Mature spores. x440. 



Fig. 12. Hypha' in the medullary stratum of the orbicular 



