18 1. CTATHEA. 



round or oblong, buUate, rigid, with the edges much reciu-ved. Texture rigid; 

 surfaces copiously scaly when young. Sori 1 — 2 to each ultimate segment, 

 quite covering its under surface; indusium globose, fragile. 

 New Guinea. 



(8) C. polypoda, J»fc., Trans. Linn. Soc, Bot., 2d Series, IV, 250. 



Fronds large, 3-pinnatifid; main rachis naked. Pinnae lanceolate-oblong, 

 + 45 c.M. long, 10 — 15 c.M. broad. Pinnulae lanceolate, the lower stalked, 

 + 15 m.M. broad, pinnatifid nearly to the costa. Lobes oblong, obtuse, entire, 

 S'/s — 5 m.M. broad. Texture moderately firm; under surface covered with 

 numerous white, ovate scales, especially on the costae; veins 7 — 8 on each 

 side, deeply forked. Sori medial between the costulae and the margin; in- 

 dusium Gupulifotm, small, naked. 



Borneo. 



* (9)- C leueotricha, ChrUt, Ann. Btz., XX, 135. 



Fronds large, tripinnatifid, subtripinnate; main rachis naked, glossy, reddish- 

 brown. Pinnae stalked, approximate, to 50 c.M. long, + 18 c.M. broad, acu- 

 minate, + 30 on each side below the pinnatiGd apex. Pinnulae + sessile, 

 ± 9 C.M. long, + 18 m.M. broad, acuminate, the base slightly narrowed, 

 the edge cut down nearly to the costa; lowest pinnulae not the largest. 

 Ultimate segments pectinate, bluntish or subacute, falcate, + 23 on each 

 side below the pinnatifid apex, + 272 m.M. broad, linear-oblong, entire or 

 slightly crenate towards the apex, the margin hardly reflexed. Texture coria- 

 ceous; under surface not glaucous; costae, costulae and secondary rachises co- 

 vered beneath with pale, + adpressed, firm hairs like the costae above; 

 veins + 12 on each side, oblique, 2—3 X forked. Sori medial on the lower 

 veins, 4 — 5 on each side of the costulae; indusium thin, hyaline, globose. 



Borneo. 



(10) C. snluensis, Bit., Journ. of Bpt., XVII, 65. 



Fronds large, 3-pinnatifid or subtripinnate; main rachis pale-brown, naked. 

 Pinnae sessile, oblong-lanceolate, 30 c.M. or more long, 12—15 c.M. broad. 

 Pinnulae lanceolate, sessile, 1—2 c.M. broad, cut down nearly (or occasionally 



at the base quite) to the costa into ligulate-ohlong, toothed segments + 4 5 



m.M. broad. Texture moderately firm; rachises naked, pale-brown; under 

 surface covered with many small, white, bullate scales on the midribs of 

 the pinnulae and ultimate segments; veins 5— 6-jugate, erecto-patent, dis- 



