PLATE 61 

 Allomyces arbuscula 



Fig. I. Empty sporangia in chai.is. X 154. 



Fig. 2. Three sporangia, one discharging spores, two empty. X 420. 



Fig. 3. Vegetative branch, showing short joints and young resting bodies. X 39. 



Fig. 4. Optical section of resting body and empty sporangium with two apertures. X 420. 



Fig. 5. Two spores showing cilia. X 1296. 



Fig. 6. Spores showing amoeboid movement before encysting. X 810. 



Fig. 7. Sprouting spores. X 1008. 



Fig. 8. Habit sketch, showing empty sporangia and resting bodies. X 96. 



Fig. 9. Vegetative tips, showing refractive bodies and clear blunt tips. X 150. 



Fig. 10. Optical section of mature resting body with empty sporangium below. X 420. 



Fig. II. Long, slender thread on corn grain, showing sympodial arrangement of resting 



bodies. X 96. 

 Fig. 12. Surface view of resting body, showing pits. X 420. 

 Fig. 13. Part of branch, showing thin sheath out of which the resting body (Fig. 12) 



has slipped. X 420. 

 Fig. 14. Section of thick wall of the resting body, showing the pits and the sheath outside. 



X 1296. 

 Fig. 15. Mature sporangium just before discharge of spores. X 420. 

 Fig. 16. Group showing some sporangia before maturity and some after emptying. X 96. 



