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ILLUSTRATIONS 
PLATE I. 
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Fig. 1. Davallia decurrens. Transverse section of rncliis of piiuiii. X 20. 
2. Stenosemia pinnata. Sinus seen from above, with hairs. X 20. 
3. Humata parvula. Transverse section, nether epidermis. X 320. 
4. Davallia brevipes. Same. X 320. 
5. Asplenium sqnamulatum. Same. X 320. 
6. Scolopcndrium pimiatuni. Cell of upper epidermis, surface view. X 3-20. 
7. Vittaria falcata ( ?). Spicular cell, surface view. X 175. 
8. Same, in transverse section. X 175. 
9. Polypodium revohitum. Stoma. X 320. 
10. Xiphobolus numniularia-folius. Stoma. X 320. 
11. N. variuH. Stoma, transverse section. X 320. 
12. Same. Surface view; limit of exterior chamber shown by dotted lines. 
X 320. 
13. Stenochlaena subtrifoliata. Stoma. -X 320, 
14. Polypodium eaespitosum. Transverse section of frond. X 75. 
16. P. accedens. Surface view; upper epidermis dotted, hypodermis in so] id 
lines. X 1/5. 
17. P. sinuosum. Tangential ("surface") section of upmost green hiyer 
X 320. 
PLATE IL 
Fig. 15. Drynaria quercifolia. Surface view; upper epidermis dotteid, hypodermis 
in solid lines. X 320. 
18. Xiphobolus adnascens. iXesophyll cell, in trafcr. X 175. 
19. Asplenium Phyllitidis. Section across two sori. X 20. 
20. Scolopendrium schizocarpum. Section across double sorus. X 20. 
21. Polypodium obliquatum. Section of sorus. X 41. 
22. Vittaria alternans. Transverse section of frond, showing paraphyscs, !)ut 
without sporangia. X 20. 
23. Aspidium angulatum. Indusium, with depressed center. X 27. 
24. Aehrostichum nuroum. Paraphysis head. X 175. 
25. Xephrodium diversilobum. Sporangia. X 75. 
26. Cheiropleuria bicuspis. Stoma of fertile frond. X 175. 
27. Same. Stoma of sterile frond. X 175. 
28. Loiiiagranima ptvroides ( ?). TTalf of transverse section of frond, sporangia 
^vanting. X 27. 
29. Diplazium bulbiferum. Epidermis of nether surface. X 175. 
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