T-ENITLDE.E. XXIX. 



tral costa, the tenules compoundly anastomosing, forming irregular 

 areoles, from which proceed free included divaricate veinlets ; 

 those of the fertile fronds much less developed. 



Fronds simple pinnatifid or pinnate, dimorphous ; the fertile 

 much contracted. Bhizome short, creeping. The species of 

 Gymnopteris are usually referred to Acrostichea, but the definite 

 linear sori confined to the receptacular veins, indicate a stronger 

 affinity with the Plewrogrwmmea. 



Ex. : G. quercifolia. "Bernh. \ G. trilobata, J. Sm. 



G. taccffifolia, J. Sm. G. Feei (Leptochilus 



G. arillaris, Presl. \ G. decurrens, Fie. 







(a) Veins reduced to an obscure costa. 



28. SCOLIOSOBTJS, M. (from sJcolios, tortuous; and 



sorus, a heap.) 



AITTEOPHII sp., Hooker. 



Sori non-indusiate, linear interrupted, flexuose, and oblique- 

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

 longitudinal. Veins reduced to an obscure costa. 



Fronds simple, membranaceous, sessile; tufted on a short sub- 

 globose rhizome. Sori placed about midway between the costa 

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

 This plant having neither netted veins nor netted sori, cannot 

 belong to Antrophyum, and is quite distinct from every other 

 established genus. 



Ex. : S. ensifonnis (Antrophyum, Hook.) 



29. HOLCOSORUS, M. (from olhos, a furrow ; andsorwsj 



GBAMMITIDIS sp., Hooker. 



Son 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, solid, linear pentangular; the upper or 

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



