26 BOTANICAL GAZETTE . [jaxuary 



layer, with a few chlamydospores in situ, fundamental layer, and above it 

 sporogenous region, comprising two zones, lower distally blackened; 10, 4. 



Fig. 15. — Sporophores seen end on, showing terminal perforation; 1/16, 12. 



Fig. 16.— Sporophores seen in section, showing origin from cells of funda- 

 mental layer, spore, and terminal perforation; 1/16, 12, 



Fig. 17. — Free spores; 1/16, 12. 



Muiogone Medusae Thaxter 



Fig. 18. — -Young spore developing from proliferous end of old sporo- 



phore; 10, 4. 



Fig. 19. — Later stage of young spore of third order resulting from prolif- 

 eration of second order; 10, 4. 



Figs. 20-21. — Older primary spores ; 10,4. 



Fig. 22. — Spore showing origin of terminal appendages; 10, 4. 



Fig. 23. — -Mature spores, appendages bearing a few secondary spores; 



10, 4. 



Fig. 24. — Portion of appendage with secondary spores; 10, 18. 



Fig. 25. — Group of spores in different stages of development. 



Muiaria curvata Thaxter 



Fig. 26. — Single plant bearing two mature spores drawn in outline; D, 4. 

 Fig. 27. — Single spore seen in surface view; D, 4. 



Muiaria fasciculata Thaxter 



Fig. 28. — Single spore seen in surface view; D, 4. 



Fig. 29. — -Single plant with several spores in different stages of develop- 

 ment and numerous sterile filaments; D, 4. 



Aposporella gracilis Thaxter *W 



Fig. 30. — Two plants on wing of fly; D, 4. 



Fig. 31. — Two branches, one unbroken, other proliferous. 



Coreomycetopsis oedipus Thaxter 



Fig. 32. — -Young individual of unmodified superposed cells; 10, 4. 



Fig. 33. — Young individual, division beginning in an intercalary cell; 10, 4. 



Fig. 34. 



intercalary- 



forming 



jointed; 10, 4. 



Fig. 35. — "Younger individual in which terminal cells are beginning to 



Fig. 36.— Spo 



sporogenous 



Thaxteriola nigromarginata Thaxter 



Fig. 37. — -Mature individual; 10, 4. 



Fig. 38. — Two individuals in situ on spine of host, left one turned to 

 show partly posterior view; 10, 4. 



