BY J. H. MAIDEN. 731 



tion. Christ united all the Aspidium-like ferns without indusium 

 under the genus Phegopteris; while Diels places them under 

 various genera chiefly according to the venation. 



12. Adiantum affine, Willd., EndL, Prod. Norf. 44. 



13. Adiantum hispidulum, Swartz. [A. pubesce^is, Schk., 

 Endl., Prod. Norf. 43). 



14. Adiantum diaphanum, Blume. — I cannot find that this 

 has been previously recorded from the Island. 



15. Cheilanthestenuifolia, Swartz, var.SiEBERi. (C. Sieberi, 

 Kunze). 



C. tenui folia, recorded by Mueller (Journ. Bot. xxii. 290), 

 C. Sieberi, Kunze, and C. temdfolia, Swartz, are distinct species 

 in Hooker and Baker's Synops. Filic, but are united in B.Fl. vii. 

 Christ ignores C. Sieberi. 



C. arborescens, S\v., Endl., Prod. Norf. 45, and C. dickson- 

 ioides, Endl., Prod. Norf. 46, I cannot trace anywhere else. 

 Judging from the descriptions, they both appear to be C. tenui- 

 folia. 



16. NoTHOCHLAENA DisTANS, R.Br., Prod. 146, 1810. (Syn. 

 Cheilanthes distans, A.Br.). — Recorded as Cheilanthes from the 

 Island in B.Fl. vii. 774. 



Christ and Diels (in Nat. Pfl. Fam.) both spell the genus 

 Nothochlaena, and separate it from Cheilanthes. In New South 

 Wales we have Cheilanthes tenuifolia, also Nothochlaena distans 

 and vellea. 



The chief distinction between the genera is : — 



Cheilanthes — Veins distinctly thickened at the end. Margin 

 of the fronds recurved. 



Nothochlaena — Veins scarcely thickened at the end. Margin of 

 the fronds scarcely recurved. 



17. Pell^a rotundifolia. Hook. (Fteris rotundifolia, Forst.) 

 — Recorded in B.Fl. vii. 730, as Fteris. 



18. Pteris tremula, R.Br. {Pteris arguta, F.v.M., not Ait.). — 

 Mueller united it erroneously with the European P. arguta, Ait., 

 which it closely resembles. Recorded in B.Fl. vii. 731. 



