— 10 — 



2 — 4, satis longis, continuis. Soris ad apicem frondis 2 — 5, 

 iinmersis; indusio angusto, cylindrico, ore manifeste dilatato. 



While determining the ferns of the "Sealark" Expédition 

 I was much in doubt, whether this plant might be referred 

 to T. erosum or to T. cuspidatum, and I suggested in the 

 paper quoted above that it probably was specifically diffé- 

 rent from both. That this really is the case my présent 

 studies hâve shown. It differs from both species by the 

 absence of an intramarginal vein and by the cordate or 

 broadly truncate base of the lamina. From T. stiblimbatum 

 C. MuU. and T. aerugineum V. d. B , which likewise hâve 

 no intramarginal vein, it differs by the shape of the lamina. 

 The spurious veins resemble those of T. cuspidatum. 



Hab. Ins. Seychelles: Silhouette, Gardiner (Herb. C. Chr.). 



Trichomanes pygmaeum C. Chr. sp. nov. — Fig. 2. 11—13. 



Species minutissima, affinis T. Lenormandi V. d. B., a 

 quo differt: fronde lutescentiviridi, fragili, intégra vel sparse 

 pinnatifida, linearilanceolata vel oblanceolata, vix 2 cm longa, 

 1 — 3 mm lata, Costa mediana simplici vel 2 — 4 venulas 

 latérales simplices distantes emittente; vena intra marginal! 

 distincta, tenui, subrecta, ssepe interrupta; venulis spuriis 

 in parenchymate perpaucis brevibus sed manifestis. Soris 

 1 — 4, apicilaribus ad costam mediam et venulas latérales; 

 indusiis campanulatis, apice vix dilatato. 



M)^ figures give an idea of this tiny plant, which I 

 originally believed to be the true T. Lenormandi V. d. B., 

 this species was said by the author to hâve frouds 1,5 — 

 3 cm long by 2,25 — 4 mm wide, thus not much larger 

 than T. pygmœum, but otherwise his description agrées 

 better with the following species, to which I apply his 

 name. From this T. pygmœum differs by its more campanu- 

 late indusia, its scarcely flexuose or undulate intramarginal 

 vein, its much fewer spurious veins, and by colour, although 

 it is probable that the pale yellowish colour and the fragile 

 texture are due to âge. 



Madagascar. Région floristique de l'Est. Sur le stipe de 

 Cyathea hirsutifolia R. Bonaparte sp. nov.* — H. Perrier 

 de la Bâthie n° 7984, Septembre 1912. 



* Conf. Notes ptéridologiques fasc. V, pag. 46, where this little 

 Trichomanes is mentioned as an "Hymenophyllum épidendre". 



