DESCRIPTION OF PLATES. 441 



Fig. 25. — a, Hymenoscypha pseudo-tuber osa, a group the nat. size, 

 arising from a decayed acorn ; b, a section of a cup slightlv magnified ; 



c, two asci with paraphyses ; d, six sporidia, showing their variable 

 size, c and d x 400 times. 



Fig. 26. — a, Hymenoscyplia coronata, a group the nat. size ; b, two 

 cups magnified, one being a section ; c, an ascus with a paraphysis ; 



d, three sporidia. c and d x 400 times. 



Fig. 27. — a, Hymenoscypha Broomei, a group the nat. size ; b, three 

 cups magnified ; c, a section of a cup ; d, two asci ; e, six sporidia. 

 d and e x 400 times. 



Fig. 28. — a, Chlorosplenium seruginosum, a group the nat. size ; 

 b, two cups slightly magnified ; c, a section of a cup ; d, an ascus with 

 paraphyses ; e, seven sporidia. d and e x 400 times. 



Fig. 29. — a, Belonidium culmicolum, a group the nat. size; &, two 

 cups magnified 10 times ; c, a section of a cup magnified 10 times ; 

 d, an immature and a mature ascus with paraphyses ; e, four sporidia, 

 one of which shows a gelatinous envelope not unfrequently seen to 

 surround them, d and e x 400 times. 



Fig. 30. — a, Helotium ferruginosum, a group the nat. size ; b, three 

 cups slightly magnified ; c, a section of a cup slightly magnified ; 

 d, two asci with paraphyses ; e, six sporidia in various stages of develop- 

 ment, d and e x 400 times. 



Fig. 31. — a, Helotium claro-flavum, a group the nat. size ; b, a group 

 slightly magnified ; c, a section of a cup also magnified ; d, an ascus 

 with paraphyses ; e, seven sporidia in various stages of development. 

 *d and e x 400 times. 



Plate VI. 



Fig. 32. — a, MoUisia cinerea, a group the nat. size ; b, a group seen 

 from above, slightly magnified; c, two cups viewed sideways, also mag- 

 nified ; d, a section of a cup ; e, an ascus with paraphyses ; /, twelve 

 sporidia, representing the variation in size and form in the same 

 individual, e and/ x 400 times. 



Fig. 33. — a, MoUisia nervisequia, a group the nat. size on a frag- 

 ment of a leaf of Plantago ; b, two cups magnified 20 times, and in two 

 stages of development; c, a section of the younger one; d, an ascus 

 with paraphyses ; e, six sporidia. d and e x 400 times. 



Fig. 34. — a, MoUisia dilutella, a group the nat. size ; b, three cups 

 magnified, showing the several stages of growth ; d, three asi i ; e, eight 

 sporidia, showing the degree of variability of size and shape, d and 

 e x 400 times. 



Fig. 35. — a, MoUisia BuUii,& group the nat. size; b, a group mag- 

 nified; c, a section of a cup also magnified; d, two asci; e, seven 

 sporidia, showing variation of size, d and e x 400 times. 



Fig. 36. — a t MoUisia cerastiorum, a fragment of the host plant 



