258 HYMENOPHYLLACE.E. 



fronclis et seginentorum alata cum alls 2 mm. lata, alls undulato-crispatia. 

 Sori ad apicein lobormn jtixta rhachin sitorum solitariter vel geminatim dis- 

 positi. Involucrum ovatum dorso complanatum circ. 2 mm. longrnu l^mni. 

 latum apice triincatum margine subintegrum sed apice crenulato-denticulatuin 

 ad basin 2-valvatum. Pagina frondis secus rhachin minute equamulata vel 

 squarnis obsoletis. 



HAB. Mt. Arisau, inter Heishana et Nimandaira. 



Hymenophyllum Simonsianum HOOKER (Fig. 92); BAKER Syn. Fil. 

 p. 68. " Stipes slender, why, naked, 1-2 in. long ; fronds linear-oblong, 2-3 in. 

 long, | in. broad, once pinnatifid down to a broadly-winged rachis ; segments 

 fan-shaped, with only shallow divisions directed from the apex towards the base; 

 veins dichotonious, the margins spinuloso-dentate ; sori 1 to 4, terminal on the 

 divisions of the upper pinnae ; iiivolucrum broadly oblong, divided nearly to the 

 base ; valves spinuloso-dentate " the description here quoted agrees exactly with 

 our plant. The figures of the same species given in HOOK. 2nd. Cent. Fern. t. 

 13 and BEDDOME Fern. Brit. Intl. t. 281 accord pretty well with our fern. 

 The following description is drawn from a specimen of my collections : Bhi- 

 zorna repens filiforme fusco-rubescens teres mm. in diametro remote paucissirne 

 squamatum nitidum ; squarnas ad basin stipitum setuliformes fusco-rubescentes, 

 minus quarn Irnm. longee nitidaj. Stipes 1-1^ cm. longus glaber vel pilis setuli- 

 formibus sparse conspersus castaneo-rubescens teres. Frons in ambitu elongato- 

 oblonga vel oblonga 3i cm.-7^ cm. longa 18-23 mm. lata apice rotundata vel 

 obtusissima basi late cmieata vel truncato-cuneata ad basin breviter ad stipitern 

 deccurrens pinnatifida iuferiore circ. ad costam fissa medio circ. ad locum costa 

 ^ mm. distantem fissa superiore pinnatilobata, segmeutis generaliter cuneatis 

 subunilateralibus mediis 13 mm. longis 11 mm. latis obovato-cuneatis apice 

 obtusissimis basi cuneatis 4 mm. latis latere superiore 2-3-lobatis, lobis oblongis 

 obtusissimis basi baud constrictis, margine toto cum rhachibus argute aristato- 

 serrulatis, serrulis patentibus vel leviter ascendentibus leviter recurvis vel rectis, 

 textura hyalina membranacea in exsiccato fulvo-viridi utraque pagine glabra 

 sed ad costas venas venulas pilis brevissimis clavatis rubesceutibus conspersa, 

 costis venis venulisque utraque pagine convexo-elevatis, venis lateralibus (i.e. 

 costis pinnarum vel loborum) a costa rhachis angulo 40 egressis deorsum angu- 



