— 18 — 



opsis. The discovery of another species of this group in 

 Madagascar is very interesting. — Exception ally the basai 

 superior pinnulae bear a sorus ou the inner side. 



Trichomanes cornutum C. Chr. sp. nov. — Fig. 6. 



Eutrichomanes? rhizomate?; stipite folii examinati stricto, 

 subangulato, sordide brunneo, 10 cm longo, 1,5 m crasso, 



pilis brevissimis, 

 castaneis, crassis 

 superne sparse onu- 

 sto. Lamina (incom- 

 pleta?) ovato-oblon- 

 ga, ad 25 cm longa, 

 medio 10 cm vel 

 ultra lata, sicca 



brunneo-olivacea, 

 textura tenui sed 

 firma, praeter ra- 

 chim pilis castaneis 

 articulatis perpau- 

 cis instructam gla- 

 berrima, bipinnata- 

 tripinnatifida. Pin- 

 nis alternis, paulo 

 obliquis, 1,5 — 2 cm 

 inter se distantibus, 

 sessilibus, inconspi- 

 cue decurreutibus, 

 oblongis, mediali- 

 bus circiter 5 cm 

 longis, 2,5 cm latis, 

 superioribus inferiori busqué brevioribus, apice lato lobato 

 vel dentato obtusis. Pinnulis alternis, obliquis, sessilibus, 

 decurrentibus, circumscriptione obovato-cuneatis, in parte 

 superiore 5 — 8 mm latis, irregulariter pinnatisectis vel 

 lobato-dentatis : supra basin antice segmentum singulum 

 (raro segmentis binis, rarissime ternis) bifidum soriferum 

 emittentibus, parte maxima superiore stei'ile sublobatis, lobis 

 bidentatis. Venis distinctissimis, incrassatis, prominulis, re- 

 petito furcatis, furcaturis in dentés transeuntibus convergen- 



Fig. 6. Trichomanes cornutum n. sp. a, Pinna from 

 the middle of the leaf, nat. size; b, a middle pin- 

 nula, X 2 ; c, two soriferous segments, the left-hand 

 from a lower, the right-hand from an upper pinnula; 

 d, fragment, more magnified, showing the outer fur- 

 cations of the veins and the thickened margins. — 

 C. Chr. del. 



