TMTHIlnyEM. XXIX. 



tral ooBta, the vemites oompoundly anastomosing, forming irregular 

 areoles, from wliieli» proceed free included divaricate vemlets; 

 tliose of the fertile fronds much less developed. 



Fronds simple piunatifld or pinnate, dimorphous j the fertile- 

 much contracted. Bhizome short, creeping. — The species of 

 Qymnopteris are usually referred to AcrostichetB, but the definite 

 linear sori confined to the receptacular veias, indicate a stronger 

 affinity with the Plewrogrcmmea, 



Ex. : G. quercifolia, Benik, I G. trilobata, J. Sm, 



G. taccBBfolia, J. 8m, G. FtSoi {LeptoehiluB lauceolatus^f ^0.^ 



6. axillaris, Pregl, \ G. decurrens, i^^e. 



§ T^NITIDEa;. 

 (a) Veins reduced to an, oisewre eosta. 



28. SCOLIOSOBUS, M. (from sTcolios, tortuous; and 



sons, a heap.) 



AjTEEOPHU sp., Sooker, 



Son non-indusiate, linear interrupted, flexuose, and ohlique- 

 branched on the exterior side j the receptacles immersed, medial, 

 longitudinal. Veins reduced to an obscure cosfca. 



Fronds simple, membranaceous, sessUe; tufbed on a short suh- 

 globose rhizome. Sori placed about midway between the costa 

 and margin. Veins apparently none, except the obscure costa. — 

 This plant having^either netted veins nor netted sori, cannot 

 belong to Antr'ofhyvm, and is quite distinct from every other 

 established genus. 



Ex.: S. ensifonnis (Antrophyum, MooTc^ 



29. HOLCOSOETJS, M. (from oZio«, a furrow ; andsoTMS.^ 



GaAMMiTiDis Bp., Kooker, 



Sori immersed, non-indusiate, oval-oblong ; the receptacles 

 seated in (a pair of) deep rounded furrows on the broadest or 

 posterior face of the solid bluntly pentangular fronds, parallel 

 with the costa. Veins reduced to a simple costa, embedded in 

 the centre of the solid fronds. 



Fronds distinct, BoHd, Hnear pentangular; the upper or 

 rounded face having three shallow grooves; the lower or so- 



