CHRISTENSEN, ON SOME SPECIES OF FERNS. 3 
for the islands. The following species are new for the island 
Masafuera: 
Arthropteris altescandens (Colla) J. Sm. 
Pteris Berteroana Ag. 
Hymenophyllum cuneatum Kze. 
which all were known previously from Masatierra. JoHow 
considered 7 species, to be endemic; to this number I add 
4: Asplenium stellatum Colla, Blechnum longicauda C. Chr., 
Bl. Schottii (Colla) C. Chr. and Pteris Berteroana Ag., which 
I must accept as good species and, as far as I know, not 
found elsewhere. On the other hand Blechnum cycadifolium 
(Colla) Sturm, registered as a species in my Index, must 
be reduced to a variety of Bl. magellanicum (Desv.) Mett. 
In the Falkland Islands Dr. SKOTTSBERG has collected 
13 species, of which several were not known from the islands 
previously. As far as I can find the whole number of ferns 
now recorded from the islands are the following 15, which 
all were collected by Dr. SKOTTSBERG with the exception 
of Azolla filiculoides Lam. (magellanica Willd.) and Schizaea 
australis Gaud.; species first found by him are marked by 
an asterisk. 
* Adiantum chilense Klf. 
*Blechnum chilense (Klf.) Mett. 
Blechnum magellanicum (Desv.) Mett. var. setigerum 
(Gaud.) 
Blechnum penna marina (Poir.) Kuhn. 
*Cystopteris fragilis (L.) Bernh. 
*Polystichum adiantiforme (Forst.) J. Sm. 
Polystichum mohrioides (Bory) Pr. 
*Pteris cretica L. 
Hymenophyllum falklandicum Bak. 
*Hymenophyllum tortuosum Hk. & Grev. 
Serpyllopsis caespitosa (Gaud.) C. Chr. 
Gleichenia cryptocarpa Hk. 
Schizaea australis Gaud. 
*Ophioglossum crotalophoroides Walt. 
Azolla filiculoides Lam. 
Four other species are mentioned in the literature as 
occurring in the islands: 
1. Polystichum andinum Phil.; Christ. — This is the true 
form of P mohrioides (Bory) Pr. 
