x ILLUSTRATIONS TO 



FIG. PAGE 



24. Vertical sections of conceptacles of Gracilaria armata, Grinnelia 



americana, and Corallina officinalis . . * ' . 230 



25. Callithamnion corymbosum . . . . 232 



26. Ehabdonia Coulteri, Sphserococeus coronopifolius, Wrangelia 



penicillata, and Cruoria pellita . , . .236 



27. Dictyurus purpurascens . . , . . .242 



28. Polyzonia cuneifolia ...... 243 



29. Fruit of various species of Ectocarpus .." , ,^ . 245 



30. Dictyota dichotoma . -V" . . . 247 



31. Vertical section of receptacle of Fucus platycarpus , . 254 



32. Various species of Puccinisei , ^-. '^ " " 276 



33. Puccinia Graminis ....... 280 



34. Various species of Mucedines ..... 286 



35. Torula Cerevisise, showing successive stages of cell-multiplication 287 

 '36. Various species of SpLseriacei ' . . . . . 294 



37. Various species of Licbens '-*. . "- . - ; " . 299 



38. Sporopodium Leprieurii, Coccocarpia smaragdina, and Lecanora 



affinis ..;..... 300 



39. Paulia perforata, Calicium tympanellum, and Grraphis Leprevostei 301 



40. Nitella flexilis , . : ^ .-. .: ..' . . ,302 



41. Antberidia of Chara fragilis .' . . . . .314 



42. Furtber development of antheridia of Chara fragilis , .315 



43. Marcbantia polymorpha . . . , . .317 



44. Anatomy of frond of Marcbantia polymorpha . , ,318 



45. Arcbegonia of Marcbantia polymorpha . . . .319 



46. Elater and spores of Marchantia . . , ,. .319 



47. Funaria hygrometrica , , . , , - . 324 



48. Polytrichum commune, group of antheridia . , . 325 



49. Polytrichum commune, development of spermatozoids . . 325 



50. Microscopic structure of leaves of mosses . :., 330 



51. Development of spores of Pteris serrulata ;.", . , ~- .336 



52. Antheridium and spermatozoids of Pteris serrulata % ' . 338 



53. Archegonium of Pteris serrulata , , .V", - 338 



54. Section of footstalk of fern frond , ^ . . . . .341 



55. Pinnule of Polypodium bearing sori t , , ,. . 342 



56. Sporangia of Polypodiaceous ferns . t , . 343 

 t57. Pinnule of Lastrea Filix-mas with sori , . ; . -. . . 346 



58. Sorus and indusium of Polystichum or Aspidium . v . . ^ . 347 



59. Pinna of Polysticbum Lonchitis . - ., , ** .. . 348 



60. Sorus and cup-shaped indusium of Deparia prolifera * ' < 350 



61. Scolopendrium vulgare ^ . . . . .351 



62. Athyrium Filix-fcemina -. ' . . . . .353 



63. Asplenium Buta-muraria . % , . >^. , 353 



