EXPLANATION OF PLATE V. 



Fig. I. — Bovistella Ohiensis, Ellis & Morgan. A specimen, natural 

 size. 



Fig. 2. — Diagrammatic section of B. Ohiensis, showing the cellulose 

 and definitely limited subgleba and the free threads of the capillitium. 



Fig. 3. — Thread and spores much magnified. 



Figs. 4, 5, 6, 7. — Catastoma circumscissum, B. & C. Specimens nat- 

 tural size, showing how it grows in the ground, finally breaks away 

 and turns over. 



Fig. 8. — Pieces of the threads and the spores much magnified. 



Fig. 9. — Diagrammatic section, showing the origin of the threads of 

 the capillitium. 



Fig. 10. — Bovista minor, Morg. n. sp. 



Fig. II. — Its spores and one thread much magnified. 



Fig. 12. — Diagrammatic section of Bovista, illustrating the free 

 threads of the capillitium. 



Fig. 13. — Mycenastrum spinulosum. Peck. 



Fig. 14.— Threads and spores much magnified. 



