762 FERNS OF NORTH QUEENSLAND, 



Herberton district; R. F. Waller, 1908(Hb. Syd.). 



A very distinctive species. The lips of the indusium remind 

 one of T. bipu7ictatum, but the indusium is differently shaped, 

 being perfectly obconical, very like a pegtop or a boy's kite in 

 outline. The absence of the submarginal vein also separates it 

 very definitely from T. hipunctatum. In this respect, it is 

 similar to T. Majoi-ce, in which, however, the spurious veins are 

 more or less parallel to the midrib (not "mostly divergent"), and 

 which differs widely in the shape of the indusium, etc. 



T. CAUDATUM Brack. 



Herberton district; Waller, 1908 (Hb. Syd.). Not previously 

 known in North Queensland, apparently. 



T. PARViFLORUM Poir. 

 Creek, half-way to TuUy Falls (Gordon track); August, 1913. 



T. RIGIDUM Sw. 



Creek, half-way to TuUy Falls; in creeks at several places near 

 Ravenshoe; also Street's Bush, Kuranda. Common; Aug., 1913. 



T. pallidum, T. serratidum (found by Domin on the highest 

 peak of Bellenden Ker), T. Bauerianum, T. rigidum var laxum, 

 and T. cupressoides (found by Domin on Bellenden Ker and 

 recorded as new for Australia) I did not collect. 



Hymenophyllum Sm. 



The characters usually relied upon for distinguishing Hymeno- 

 phyllum from Trichomanes are more or less unstable. The 

 exserted receptacle is found among the Hymenophylla as well as 

 in Trichomanes, a striking instance being Bailey's H. trichoman- 

 oides {H. Baileyanum Dom.); the deeply divided indusium is dis- 

 tinctive of many Hymenophylla; but a more reliable character, 

 probably, is to be found in the cell-formation of the membrane of 

 the spore-cases; those of Hymenophyllum being usually regular 

 and numerous, and those of Trichomanes irregular and few. In 

 general, however, it may be said, with the late Baron von Mueller, 

 that the distinctions are rather sectional than generic. 



The subgeneric distinctions, within Hym,enophyllum, though 

 convenient, appear to me to be arbitrary. Sadebeck, in Engler's 



