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Sumatra (Beccari, N°. 449). ■ The description is taken from 

 a doublet received from Beccari. The plant was determined by 

 Baker as P. congener, Hk. (Journ. of Bot,, XVIII, 213). 



Polypotlium (Pleopeltis) Forbesii. r. A. t\ Mi. 



Rhizoma longe repens, nrmum, paleis ovatis vel oblongis, 

 utrinque rotundatis vel acutis, peltatis, brunneis, centro nigricanti, 

 valcle appressis dense vestitum. Stipites remoti, l 1 / 2 — 2 1 / 2 cm. 

 longi, erecti, îirmi, glabri, crassiusciili. Frondes simplices, coria- 

 ceae, glabrae, late lanceolatae, 10— 12 cm. longae, infra médium 

 2 1 / 2 — 4 cm. latae, utrinque sensim angustatae, acutae, venis 

 gracilibus, irregulariter anastomosantibus, costulis (main veins) 

 nullis, areolis venas libéras includentibus. Sori majusculi, remoti, 

 utrinque 2-seriales, seriebus exterioribus medialibus, apicem et 

 basin frondium haud occupantes. 



Sumatra (Forbes, N°. 2333). 



Polynodimii (Pleopeltis) Raapii. v. A. t\ Mi. 



Rhizoma repens, squamis lineari-lanceolatis, deciduis vestitum.. 

 Stipites remoti, 1 — 5 cm. longi, glabri. Frondes simplices, te- 

 nuiter herbaceae vel membranaceae, glabrae, lanceolatae, 10 — 12 

 cm. longae, s U—l 1 / 2 c - m - latae > (fertiles angustiores), utrinque 

 sensim angustatae, apice obtusae vel acuminatae, costa clistincta, 

 costulis (main veins) nullis, venis distinctis, areolis utrinque 

 1 — 3-serialibus, venas libéras includentibus. Sori remoti, rotun- 

 dati vel oblique oblongi, 1-seriales, margine approximati, soris 

 aliis paucis (1—5) irregulariter intermixtis. - Plantae aquatiles, 

 probabiliter submersae. 



Batu Islands (Raap, N°. 671). — Another submergecl water- 

 fern lately found in Lombok Island by Dr. Ernst has the stalks 

 shorter, the fronds a little broader and slightly scaly on the 

 costa beneath, and the sori placed in 1 — 2 rows nearer the 

 midrid than the edge, whether or not accompanied by some few 

 others placed in a 3rd, outer row. 



Poly podium (Pleopeltis) Valetoiiiaiium. r. A . r. Mi. 



Rhizoma repens, crassum, viride, paleis tenuiter membranaceis, 

 flavidis, lanceolatis, acuminatis, erectis, leviter sed distincte crispatis, 

 basi peltato-rotundatis vestitum, demum glabrum. Stipites remoti, 

 glabri, firmi, erecti, rubicundo- vel brunneo-virides, 5—15 cm. longi, 



