288 
FERNS : BRITISH AND FOREIGN. 
subauriculate on the upper margin. Sort nniserial, 
antimarginal. Indusium suborbicular. — Borneo. 
Obs. — The affinity of this species is with 3ST. tuberosa ; but 
seeing the two plants together, the difference is readily seen. 
79a. ISOLOMA, J. Sm. 
Vernation fasciculate, erect, stoloniferous. Fronds linear, 
1-2 feet long, pinnate ; pinnae oblong, elliptical or lanceolate, 
falcate, coriaceous, the base truncate and subauriculated ; 
petiole short, articulated with the racliis. Veins forked ; sterile 
Genus 79a.— Portion of sterile frond and a fertile pinna, natural size 
ditto enlarged. No. I. 
venules free, the fertile transversely combined at the margin, 
for min g a continuous receptacle. Indusium linear, interiorly 
attached, plane, equal with and conniving with the margin, 
forming with it a vertical exteriorly open groove, containing 
the sporangia. 
1. I. lanuginosa, J. Sm. in Fond. Joum. Bot. 1, p. 420. 
Lindsaea lanuginosa, TFaZZ. ; Hook. Sp. Fil.\,t. 69 B. 
— Singapore, Penang, Kew Guinea, and Seychelles 
Islands. 
