PLANTS JAVANIC.E RARIORES. 563 



formibus in laminam transversim interrupte striatam vix 

 definitae latitudinis facile, ut in plerisque Filicibus Lyco- 

 podinersque, solubilibus. Stipites elongatae frondem ipsam 

 saepius superantes crassitie pennae anatinae, adultae glabrae 

 laeves pallide castaneae teretiusculae antice canaliculatae ; 

 vasis scalariformibus tubum fere completum antice defi- 

 cientem efformantibus. Frondes ad basin nsque bipartitae 

 potiusve binatae ; partiales dimidiatae palmato-lobatae, lobis 

 incisis indivisisque acuminatis serratis ; novellae utrinque 

 tectae vellere ferrugineo-castaneo e pilis articnlatis laxis 

 constante ; adnltae glabratae pilis nonnullis secundum latera 

 venarum primarium aliisque soros cingentibus relictis. 

 Venae primariae dichotomae valiclae, subter prominentes 

 teretes, super vix emersae, divisionibus ultimis saepe infra 

 apicem acuminatum lobi conniventibus et unitis. Venulae 

 secundariae et tertiariae clivaricatissiraae creberrime anasto- 

 mosantes areolas subquadratas sed amorphas efformantes, 

 ultimae liberae apice vix clilatato. Epidermidis areolae 

 minutae parietibus paulo flexuosis. Stomata in pagina 

 tantum inferiore. Sori parvi subrotundi passim e con- 

 fluentia duorum amorphi, lateribus venularum tertiarium 

 saepiusque ubi plures conflimnt insidentes, novelli pilis 

 articnlatis copiosis semitecti, adulti pilis brevioribus capsulis 

 interstinctis. Capsulae breve pedicellatae annulo verticali 

 incompleto lateribus areolatis. Spora laevia subovalia inae- 

 quilateramargine altero convexo altero rectiusculo. 



Obs. ]. — Dr. Horsfield, who discovered this remarkable 

 species in 1814, has the following observations respect- 

 ing it. 



" I have four localities for this Fern. The most western 

 is the mountain Karang, situated south of Bantam ; next 

 the mountain Gede, south of Batavia; proceeding west- 

 ward, Ptarangan ; and finally Mount Prahu ; the latter lies 

 south-west of Samarang. It is remarkable that I never 

 noticed it in my numerous excursions through the eastern 

 provinces ; and I have concluded that it is not at all, or at 

 least that it is very rarely, found eastward of the longitude 

 of Samarang, which lies near the middle of the island, as far 



