L ew ton- Brain. — Cordyceps ophioglossoides ( Ehrh .). 531 
EXPLANATION OF FIGURES IN PLATE XXVIII. 
Illustrating Mr. Lewton-Brain’s paper on Cordyceps ophioglossoides. 
Fig. 1. General drawing of Cordyceps ophioglossoides , with two mature stromata. 
Fig. 2. Mature perithecium in median section; hy., hymenium ; as., asei in 
different stages of development ; o. , opening of neck of perithecium. 
Fig* 3* Part of young ascus in longitudinal section, with very few nuclei (n.). 
Figs. 4, 5 a, b, c, 6, 7, 8. As Fig. 3 showing progressive stages in division of 
nuclei, before divisions occur in the protoplasm. 
Fig. 9. As before, showing longitudinal line of division in the protoplasm. 
Fig. 10. As Fig. 9, showing both longitudinal and transverse divisions. 
Fig. 11. Part of ascus with nearly mature sporidia. 
Fig. 12. Cap of ascus. 
Fig. 13. Part of ascus showing three rows of ripe spores. 
Fig. 14. Transverse sections, of asci of various ages. 
Fig. 15. Transverse section of sterile portion of stroma ; ex., outer hyphal layer ; 
in., central hyphae. 
Fig. 16 a and b. Camera lucida drawings with same magnification (about 1000), 
(a) of external hyphae of Cordyceps, (b) of Elaphomyces variegatus. 
Figs. 17-23. Various unions between large hyphae of Elaphomyces and the 
smaller parasitic hyphae of Cordyceps ophioglossoides. 
Fig. 24. Part of tangential section of cortex of Pine root, showing intercellular 
network of hyphae {inti). , 
Fig. 25. Transverse section of root in same condition as in Fig. 24 ; sh., fungus- 
sheath ; int., intercellular network ; c., cortical cells ; st., stele, x 225. 
Fig. 26. Part of cortex of Pine root, showing more advanced stage than Fig. 25. 
X 225. 
Figs. 27, 28. Sections showing still more advanced stage; cor., remains of cortex. 
Fig. 27 x 225. 
Fig. 29. Part of rootlet in transverse section, without external fungus-sheath ; x., 
intracellular network of hyphae ; c., cortical cells ; par., parenchyma of stele. 
Fig. 30. Part of cortex of similar root. 
Fig. 31. Part of cortex of another rootlet, showing bunches of intracellular 
hyphae (h.). 
