324 ON A THIRD COLLECTION OF FERNS MADE IN WEST BORNEO. 



Sarawak, Chas. Hose. Not nearly allied to anything already 

 described. 



221 (28*). Lindsaya (Isoloma) indurata, n. sp. — Kootstock 

 creeping, l-12th in. diain., clothed at first with very minute 

 spreading linear brownish-black paleae. Stipe wiry, naked, cas- 

 taneous, 8-9 in. long. Lamina lanceolate, simply pinnate, about 

 a foot long, f-1 in. broad, firm in texture, green and glabrous on 

 both surfaces. Pinnae oblong, obtuse, sessile, subequilateral, 

 entire, ^ in. broad, the edge rather reflexed. Midrib dis- 

 tinct ; the other veins obscure and immersed. Sori continuing 

 all round the sides and tip of the pinnae. Indusium with two 

 narrow valves. — Niah, Sarawak, Chas. Hose. Allied to L. divergent 

 Wall. 



222 (16*). Adiantum Hosei, n. sp. — Eootstock not seen. 

 Stipe slender, castaneous, a foot long, with a few small reflexed 

 linear brown palese towards the base. Lamina rhomboid, bipinnate, 

 moderately firm in texture, green and glabrous on both surfaces ; 

 rachis naked, castaneous. Pinnre lanceolate, 4-9 in. long, f-1 in. 

 broad. Segments close, numerous, rhomboid-dimidiate, obtuse, 

 shortly petioled, the central ones f-1 in, long, f-^ in. broad, 

 minutely crenate when sterile. Sori 1-2, placed on the upper 

 margin of the segments, at most i-i in. long. Indusium broad, 



firm, glabrous.— Pendulous on limestone cliffs, Sarawak. Near A. 

 affine Willd. 



224 (29*). Pteris (Etjpteris) Walkeri, n.sp. — Eootstock not 

 seen. Stipes naked, castaneous, 6-8 in. long. Lamina rhomboid, 

 irregularly tripinnate, about a foot long, moderately firm in texture, 

 green and glabrous on both surfaces ; rachises castaneous. Pinnae 

 usually caudate ; upper and terminal pinna simply pinnate; several 

 lower forked at the base; final segments linear, obtuse, at most 

 f in. long, l-12th in. broad. Veins copiously pinnate in the final 

 segments; veinlets indistinct. Sori occupying nearly the whole 

 margin of the final segments. Indusium narrow, glabrous.— Found 

 by Dr. Hose on Banggi Island, and previously by Mr. H. Walker 

 at Silam, in North Borneo. Allied to V. quadriaurita Betz. 



223 (22*). P. (Eupteris) furcans, n. sp. — Eootstock not seen. 

 Stipe naked, slender, castaneous, 5-6 in. long. Lamina deltoid, 

 6-8 m. long, moderately firm in texture, green and glabrous on 

 both surfaces; rachises castaneous. Pinnae lanceolate, simply 

 pinnate, f-1 in. broad; lower forked at the base. Final segment: 

 linear, entire, obtuse, adnate to the rachis, M2th in. broad. Veins 

 copiously pinnate in the final segments. Sori falling short of the 

 tip of the segments. Indusium narrow, glabrous.— liarain, Sarawak. 

 Near P. quadriaurita. 



225. P. quadrumrita var. digitata Baker. — Sarawak. These 

 fine specimens how that this is substantially identical with the 

 Himalayan P. Grcvilhana Wall. 



226. Aspltnium Plujllitulisj). Don.— Niah, Sarawak, Chas. Hose. 



227. A. baiitameme Baker.— Langir, Sarawak, Chas. Uose. 

 220. Nephrodium borneen.se Hook.— Sarawak. 



228. iV. vastum Baker.— Lambir, Sarawak. 



