iQ2o] WALKER— CYATHUS 23 



Fig. 31.— Much higher magnification of small portion of hymenium from 

 peridiole just beginning to form spores, showing young binucleate basidia and 

 uninucleate basidia; X585. 



Fig. 32. — Mature binucleate spores from same peridiole as fig. 31; X585. 



Fig. 33. — Longitudinal section of peridium of mature basidiocarp: a, 

 loose outer layer; b, pseudoparenchymatic layer; c, inner, loosely interwoven, 

 and more or less gelatinized layer; X225. 



PLATE IV 



Cyathus striatus 



Figs. 34, 35. — Median longitudinal sections of youngest basidiocarps 

 found (basidiocarp in fig. 35 bent at base so that section of lateral wall is seen 

 at base); X14. 



Fig. 36. — Median longitudinal section of older basidiocarp with peridioles 

 appearing; Xi4- 



Figs. 37-39. — Higher magnifications of basidiocarps shown in figs 34, 35, 



36; X34- 



Fig. 40. — Median longitudinal section of still older basidiocarp; X73. 



Fig. 41. — Higher magnification of portion of section shown in fig. 41 ; X34. 



Fig. 42. — Tangential longitudinal section showing folding of incurved 

 portion of peridium 5X31. 



Fig. 43. — Section of nearly mature peridiole; X34. 



Fig. 44. — Higher magnification of portion of section seen in fig. 39 show- 

 ing converging filaments in early development of peridiole; X225. 



Fig. 45. — Section of peridiole producing spores, showing hymenial layer; 

 X225. 



Fig. 46. — Section of peridiole producing spores and funiculus; X225. 



Fig. 47. — Mature spores; X360. 



Fig. 48. — Section of peridium of mature basidiocarp; X225. 



PLA TES V, VI 



Crucibuhtm vulgare 



Figs. 49-52. — Median longitudinal sections of very young basidiocarps; 



X31. 



Figs. 53-55. — Median longitudinal sections of basidiocarp showing early 



stages in gelatinization of filaments bordering primordium of gleba; X31- 



Fig. 56. — Median longitudinal section showing origin of peridioles; X31. 



Fig. 57. — Slightly tangential longitudinal section showing early stage in 

 development of peridiole and funiculus; X31. 



Fig. 58. — Longitudinal section of older basidiocarp; X13. 



Fig. 59. — Section of peridiole before spore formation, and funiculus; X31. 



Fig. 60. — Section of mature funiculus showing clamp connections; X360. 



Fig. 61.— Longitudinal section of nearly mature basidiocarp; X13. 





