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frondiura fertiliura Longiores. Frondes dimorphae ; frondes steriles 

 valde coriaceae, glabrae, simplices, ovato-oblongae vel sublaneeo- 

 latae, + 9—11 cm. longae, infra medium + 4 — '5 cm. latae, 

 apicem versus angustatae, apice obtusae vel obtusiusculae, margine 

 leviter incrassatae, leviter crenatae, crenis rectis vel late sub- 

 rotundatis, basi rotundatae vel cuneatae, leviter deeurrentes, costa 

 prominente, costulis (main veins) distinctis, erecto-patentibus, mar- 

 ginem haud attingentibus, areolis immersis, absconditis, venas 

 liberas includentibus ; frondes fertiles lineares, + 15 cm. longae, 

 infra medium + 1 cm. latae, basi abrupte cuneatae, apicem 

 versus sensim angustatae, costulis (inflmis exceptis) patentissimis. 

 Sori magni, profunde immersi, utrinque 1-seriales, inter costulas 

 solitarii, mediales, summi + rotundati, caeteri basin frondis 

 versus sensim elongati, costae perfecte paralleli, infimi lineari-oblongi, 

 + e - m - ' (,n Sb i 1- 1 1 /2 m.m. lati. 



Jaoa (Preanger Regencies, v. A. v. K. ). — The species bears 

 the name of Dt. Th. Valeton, Director of the Buitenzorg Herbarium. 



Polypodiiiiii (Pleopeltis) panel jugum. r. Jt* r. ft. 



Rhizoma repens, tenue, paleis lanceolatis vestitum. Stipites 

 tenues, erecti, paleacei, alati, infra partem alatam 4 — 10 cm. 

 longi. Frondes tenues sed flrmae, subtus minutissime pilosae, 

 10 — 20 cm. longae, profunde pinnatifidae, lobo terminali integro, 

 5 — 10 cm. longo, 1 /2~~l 1 / / 2 c.m. lato, lobis lateralibus similibus, 

 2 — 4 utrinque, erecto-patentibus vel suberectis, apicem versus 

 sensim angustatis, apice acutis vel obtusiusculis, basi ala angusta 

 connexis, infimis in alam stipitis sensim decurrentibus, costulis 

 (central ribs of the lobes) venisque primariis subtus prominentibus, 

 areolis primariis 1- serialibus, areolis secundariis in et extra areolas 

 primarias indistinctis, venas liberas paucas includentibus. Sori 

 in areolis primariis 1 — 2, parvi, suboblongï. 



Borneo (Teuscher). 



P I. AT 1 CE II I U 11 . ËH>* r . 



Platycerimn Willieliiiiiia k ifesrimt*. r. 1. r. ft. 



Frondes steriles 2 vel plus, usque ad 100 c.M. altae et latae, 

 erectae, convexae, parte superiore profunde lobatae, laciniis latis, 

 linearibus, simplicibus vel 1— 2X furcatis, parte exteriore sinuato- 



