BY W. W. WATtS. 767 



elongatae, angust?e, muris crassis, levibus. Sori plerumque soli- 

 tarii, raro bini, in superiore frondis dimidio, in segmentis brevi- 

 bus anterioribus. Indusium elongatum, angustatum, infra infun- 

 dibuliforme, connatum, parce hirsutum, supra in duas perlongas 

 labias divisum, apice anguste-rotundato, integro. Becejjtaculnm 

 (in speciminibus completis) longe exsertum. 



Evelyn Scrub; R. F. Waller, 1908 (Hb. Syd., under ''N.tnn- 

 hridyense var. exsertum Bail."). 



This very distinct species agrees with H. tuubridgense in 

 having the sori on short anterior segments next to the rhachis, 

 but differs greatly through the half-cupped indusium with its 

 entire lips, the exserted receptacle, the cell-formation, and the 

 hairy stipes and rhachis. In the cell-formation and in the closely 

 placed, sharp teeth of the segments, it approaches H. prcetervisum, 

 but differs in size and construction, and especially in the position 

 and structure of the sori. I was, at first, inclined to regard this 

 as a different plant from H. tunhridgense var. exsertum Bail., but 

 having seen a fruiting frond of var. exsertum, I am convinced 

 that the two are identical. Domin made this plant a var. of H. 

 prcetervisum Christ, but the fructification is not at all clustered 

 at the apex, as it is in Dr. Christ's species. 



(b) Leaves strongly crisped throughout. 



H. Kerianum, sp.nov. (Plate Ixxxvii., fig.6,<7--e.) 

 Rhizoma tenui-filiforme, ramosum, longis flexuosis articulatis 

 paleis parce praeditum, prsecipue in nodulis frondes gerentibus. 

 Stijyes 1-2 cm. altus, fere ad basin alatus, ala sinuoso-denticulata 

 (in speciminibus raro completa), supra latiore. Frons 2-3*5 cm. 

 longa et 1-2 cm. lata, ovato-oblonga vel lanceolata, suberecta vel 

 falcatula, pinnis alternantibus, modice distantibus, 4-6-jugis, 

 erecto-patentibus, flabellato-pinnatifidis, ultimis segmentis crisp- 

 atis, sinuato-denticulatis denticulis elongatis pulcherrimis, nervis 

 distinctissimis, rufo-fuscis; rhachis ala latiuscula, crispata, sinu- 

 ato-longedenticulata instructa, costis similiter constructis; cellule 

 pulcherrimae, irregulares, plus rainusve rubentes, muris crassis 

 linea centrali angusta interrupte-hyalina instructis. Sori soli- 

 tarii, 4-6 in segmentis brevibus, anterioribus, in parte frondis 



