DESCRIPTION OF THE PLATES. 



Plate I. Views in Godavari with liealthy nv.d diseased i)alinvra palms. 

 Palm climbers and their work. 

 Upper figure : a severely diseased clump of palms. Lower 



figures : spots on leaf-sheath and leaf-hlade of palnm-a. 

 Pi/t/iiu))! pdhnivoruni, Bull. All figures magnified 320 diameters 

 except when otherwise stated. 

 Superficial branched hypha. 

 ,, 2. Superficial mycelial web bearing sporangia. 



3. Sporangia on long stalks, from a young culture in a moist atmosphere. 



4. Small sporangia, formed laterally on old hypha- when placed in a moist 



atmosphere, x 186. 

 „ .5. Irregularly shaped sporangia. 

 Figs. 6 & 7. '"Pythium" type of germination of the sporangium. 

 Fig. 8. • • Phytopthora" type of germination of the sporangium. 



„ 9. Germination of the zoospores within the sporangium. 

 Figs. 10 & 11. Germination of the sporangia by germ-tubes. 10. a, h and c, 

 single germ-tube from the apical papilla, with early formation of 

 secondary sporangia in h and c. d, single germ-tube laterally from 

 below the papilla. 11. Multiple germ-tubes. 

 Fig. 12. Germination of the zoospores. 

 „ 13. Degeneration of a zoospore without germination. 

 5, 14. Germination of two double zoospores. 



„ 1.5. Penetration of tiie sporangial wall by germ-tubes of zoospores which 

 have failed to escape from the sporangium, a and h profile and sur- 

 face views showing the swollen vacuolate apex of the germ-tube and 

 the swelling and gelatinization of the wall at the point in contact with 

 the apex, c penetration effected, x al)out 400. 

 Plate V. Figs. 1 to 10. Resting spores of Pijthium palmivorum. x 640- 

 Fig. 1. Resting spores with septate stalk IwphaD. 

 Figs. 2, 3 & 4. Irregularly swollen and branched stalk liyphae. In fios. 2 and 



4 the branches simulate antheridia. 

 Fig. 5. A cluster of resting spores on branched swollen stalks. 

 ,, 6. Resting .spore on the tip of a long unseptate hypha. 

 „ 7. Intorcalnr resting spore. 



