Systematik und Pflanzengeographie. 339 



points. Pinnae oblong-lanceolate, 2 feet long, 7—8 inches broad. Pinnules sessile, lanceolate- 

 ligulate, 3 J /2 — 4 inches long, an inch broad, cut down to the rachis into close, blunt, 

 distinctly crenated tertiary Segments 2 lines broad. Texture thin, but firm. Both surfaces 

 glabrous, the lower with a few minute bullate scales on the midrib of the tertiary segments. 

 Veinlets 12 — 14 -jugate, close, fine, distinct, deeply forked, the lowest sometimes bifurcate. 

 Sori placed close to the costa, and a space froni the edge, with a distinct space between 

 each, sometimes 12 15 to a segment, absent from the upper third of the segments. — 

 Wolsauinsel, Aru-Gruppe. 



Hymenophyllum (Leptocionium) polyodon Bak. n. sp. Rhizome wide - creeping, 

 filiform, lanose. Stipe 3 / 4 — 2 inches, filiform, flexuose, fibrillose. Lamina lanceolate, tri- 

 pinnatifid, 2— 3 inches long, */ 2 — 1 incli broad. Pinnae 8- 12 jugate, rhomboid or lanceolate- 

 rhomboid, parallel with the rachis on the upper side at the base, cuneate - truncate on the 

 lower side, the central ones the largest, */ 4 inch broad at the middle, the lower ones 

 reduced. Ultimate segments 10—15 to a pinna, ligulate, close, 1 /a — 1 mcü long, bordered 

 by regulär, numerous, minute teeth. Sori one to each pinna, terminal on a side segment of 

 the lowest anterior pinnule. Involucre turbinate, a line deep, the very base immersed in 

 the lamina; valves toothed at the edge, free nearly to the base; receptacle exserted. — 

 Admiralitätsinseln. Steht ziemlich in der Mitte zwischen H. tunbridgense und multifidum. 



Nephrodium (Eunephrodium) »licrochlamys Bak. n. sp. Caudex absent. Stipe 

 'j2 foot, pale bruwn, scaleless, finely pilose. Lamina oblong-lanceolate, 2 — 3 feet long, 

 12 — 15 inches broad, bipinnatifid. Pinnae, below the small entire top ones, about 40-jugate, 

 sessile, linear -lingulate, the largest 7—8 inches long, 3 / 4 — 7 / 8 inch broad, the lowest not 

 reduced, cut down to a broad wing into close, blunt, entire, rather ascending lobes i l 8 inch 

 broad, of which the lowest on the anterior side is rather larger than the rest. Texture 

 membranous. Both sides finely pilose and denseley dotted with minute pale-brown glands. 

 Yeinlets 12— 16 -jugate, the lowest pair forming a deltoid arch midway between sinus and 

 costa. the next two pairs meeting at the sinus. Sori round, minute, forming a regulär row 

 nearer the costa than the edge of the lobes. Involucre minute, persistent. — Kleine Kei- 

 insel. Vom Habitus des N. molle, jedoch durch die Sori und Nerven gut unterschieden. 



Polypodium (Niphobolus) macropodum Bak. n. sp. Rhizome woody, short-creeping, 

 a line thick, clothed with minute, adpressed, deltoid, black scales with a brown border. 

 Phyllopode 3—4 lines, clothed with scales, just like the rhizome. Proper stipe bordered 

 very nearly to the base. Fronds all alike (barren and fertile), ligulate, very thick and 

 rigid in texture, 4—8 inches long, %— 3 k m ch broad, the fertile portion contracted, the 

 point acute, the base narrowed very gradually, the upper surface naked, the lower clothed 

 with thin cottony tomentum like that of P. adnascens. Veins entirely hidden. Sori like 

 those of P. adnascens, occupying continuously the contractedupper half of the fronds, 

 minute and immersed in the pale-brown tomentnm, 6—8 in an erecto-patent row between 

 midrib and edge, and each showing distinctly on the upper side of the fronds. — Aru-Inseln. 



Polypodium (Niphobolus) pachydermum Bak. n. sp. Rhizome wide creeping, 1 line 

 thick, woody, flexuose, clothed with minute adpressed, lanceolate, black scales with a brown 

 border. Phyllopode very short. Stipes naked, ^—1 inch. Frons dimorphic: the barren 

 ones oblanceolate-oblong, obtuse, 1—2 inches long, cuneate at the base, l \ 2 - 3 U inch broad; 

 the fertile ones ligulate, 3—4 inches long. Veins quite immersed. Texture very thick and 

 rigid, the upper surface naked; the lower with only a coating of minute stellate scales, 

 visible under a lens, with a distinct bare space round each. Sori occupying the upper half 

 or two thirds of the fertile fronds, superficial, 1 j 2 line broad, 6—8 in an erecto-patent row 

 between midrib and edge. — (Steht ebenso wie das vorige dem N. adnascens nahe, ist 

 jedoch durch das diekere und rigidere Laub leicht zu erkennen.) 



Polypodium (Phymatodes) millisorum Bak. n. sp. Rhizome not seen. Stipe stout, 

 with a narrow wing extending nearly to the base. Lamina linear-ligulate, 2—2^2 feet long, 

 2— 2 1 / 2 inches broad at the middle, narrowed very gradually to both ends, rigidly coriaceous, 

 quite free from hairs or scales on both surfaces. Veins fine, immersed, the main ones 

 zigzag, V2— 3 / 4 inch apart in the centre of the frond, distinct three quarters of the way to 



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